It largely means making the shooter parts of it run better. Many people enjoyed the Action RPG combat, but some people thought that the framerate drops made the combat less fun, or that it was too easy at some levels and too hard at other levels, in not-fun ways. As I've said elsewhere, the combat is already better than it was in the first game, and that's with much of it in very early stages.
If you don't like Action RPG combat, of course, this news doesn't really change much. It's going from a flavor you don't like to faster, cooler version of a flavor you don't like. As someone who hadn't played a shooter since Half-Life before coming onto the project, I think the story is worth trying out the new combat style for, but then, I'm hardly an unbiased observer.
Greetings, if you really are connected with Mass Effect 2, I would wish beyond reason (haha) that you would take these thoughts into consideration and maybe even pass them up the line (nudge nudge).
I do like MAss Effect, but I feel it could be so much more without the only sole purpose to make it a FPS first and foremost.
After playing it and letting the gameplay settle, I think it was missing many features that made both Baldur's Gate and Mass Effect's closest cousin KOTOR good games.
I feel Mass Effect is basically a FPS with some RPG elements all revolving around a Biowarian plot. But, when comparing it to KOTOR 1 & KOTOR 2 (even though Bio didn't make KT2), it lacks in gameplay aspects, mainly concerning variety.
KOTOR 1 had some mysteries to solve like the trial on the oceanic planet.
KOTOR 2 had the excellent grey character of Kreia, C. Avellone's masery at work there. It had its own little mysteries like finding a solution to the Peragus fuel explosion.
But, as far as gameplay, I think Mass Effect's biggest mistake is in the lack of real hacking and stealth gameplay.
Hacking was put to great use in the two KOTORs as you were able to find alternate routes, spy on various areas, disable sentry drones & cameras, eliminate certain enemies
You were also able to split and go solo from the party and go complete stealth for some of the missions opening up another style of gameply to add variety.
It was much better being able to play as T3 to do hacking or repair mission, or the other chgaracters for their specific misisons. In Mass Effect you only play as Shepard...
In KOTOR 2 you even had a mission as T3-M4 sneaking into the droid warehouse
Mass Effect was just exploring and shooting with story. It missed about half of the gameplay the KOTORs had. One gets tired of the gameplay in MAss Effect much earlier then the KOTORs.
And thats not even mentioning how Mass Effect can definitely use some inspiration from the oldies like: Starflight, Space Rogue, Sentinel Worlds: Future MAgic, Hard Nova, Protostar etc.