Most of what steel does is done better by others.
On offense, water, grass, fighting and even some choice ground types do better against rock types, and against Ice, fire fighting and rock can do more, its only match is does best against is fairy types, which aside from gardevoir (who can be handled by ghost types better) and the likely Togekiss (who has many weaknesses to other common types) arent seen often on defense. It likely wont be until gen V with Kyurem and gen VI with Xerneas that steel, in its present form, will see much use
On defense, Steel defensive capabilities weren't translated well into GO's mechanics. The main series gave them a reputation for being defensive, but because of the speed mod, that did cut into their defenses and offense (as well as the ability to pick the best possible counters, in the main games their numerous resistances were more useful). Often times their typings come as a double edged sword, trading large numbers of resistances for a double weakness or numerous other weaknesses
Gen IV has a few steel types that can be somewhat good, the obvious Dlalga and Heatran and the stupidly good Doom Desire on Jirachi (though who knows how long it will be, or if it will be preserved), and possible good nonlegendaries In Magnazone and Empoleon,(I know its a long shot but maybe a metagross community day?) Is there any realy hope for Steel? any good steel moves in the game that current pokemon cant take advantage of because of stats, or does it seem like they'll all get scrapped?
Empoleon is the worst of the water lot if I remember my starter analysis correctly.
Steel is the defensive OP Psychic counter, Dark is the offensive one; their respective stats have been translated accordingly. Without a second formula change (there was one you missed back in the day), it's unlikely Steel will move to an offensive role.
Against Blissey, Metagross has mediocre DPS but very high TDO (comparable to Mewtwo with Focus Blast) due to resisting all her moves. If Metagross is given better moves (such as Meteor Mash from Community Day), the increase in DPS would make it an incredible (possibly even the best) Blissey counter.
Metagross with a speculative steel-type Counter/steel-type Hydro Cannon tops Rayquaza in neutral DPS by 2% but is still behind Machamp by 18% against Blissey. Metagross would need to get completely unprecedented levels of brokenness on Meteor Mash to compete as a go-to Blissey counter, hard to see it having any chance of that.
You mentioned Dialga, Heatran, and Jirachi, both of which will be very strong. Dialga is only weak to fighting and ground types, so basically fighting type until Precipice Blades/Drill Run are released. But depending on moves it will likely be better used as a dragon type attacker. Heatran will likewise be better suited to the role of fire type attacker. Jirachi is mythical but very strong with Doom Desire.
As for Metagross, its only hope outside of a recalculation of stats is Meteor Mash from community day. That and its mega evolution of course.
Scizor is decent but it’s more useful as a bug attacker.
Steelix is good on defense but weak to machamp.
Empoleon will likely not be very good.
Moveset pending, Magnezone will be good, either electric or steel.
There’s also Aggron, who gets a pure steel mega evolution later on, which will likely be pretty powerful.
Steel type just doesn’t translate well into Pokémon GO. Its best role is very limited, to hop in in-between machamps to take out the occasional Gardevoir in gyms, soon to be the occasional Togekiss as well. Everything steel can do other types can do better. Even on defense, the defensive role is rendered useless with a weakness to fighting type, Machamp can just roll through gyms stacked with normal and steel type Pokémon.
I guess we’ll see if Metagross gets a better move and if gen 4 has any surprises.
Metagross has great stats and in particular a great base attack stat. With a great moveset, it would out-DPS all current Fire, Rock and Fighting types as the best Ice-type counter, which would naturally also make it a better Rock-type counter than Fighting.
Steel doesn't translate that well into POGO, it's better as a secondary type to gain resistances, but the best steel attacker is also only held back from top attacker status by its moveset. Remains to be seen what happens with Dialga and whether Beldum gets a CD with Meteor Mash.
Steel-types are in a similar boat with ground-types right now. They have some standouts (and more coming in Gen 4) with exceptional stats and typing, but are held back by sub-par moves. Metagross is a prime example of this. It has high attack, very solid bulk, and a ton of resistances. Unfortunately, it's moves are all very mediocre. So it's not the speed mod or sub-typing that hold it back in the slightest. Just it's available moves. If Gen 4 introduces some strong new steel-type moves, then we could see steel become much more meta relevant, especially with Dialga and Heatran coming into the mix in the near future as well.
