I agree, I'm not enjoying the 'mech' feeling in MW4 (I have the mektek gubbins).
MW3 was much better. Unfortunately, I can't get it, or pirate's moon running without severe graphic issues, which is a complete shame. MW3 actually runs slightly better than pirates moon, but the graphical issues are so bad, I can barely see in front of me. Lol I'll keep looking for a fix.
MW4 does just feel like a clunky bad FPS compared to MW3 Mech SIM feeling.
Lasers also feel more "meh" in MW4. More heat and less damage. The controls in MW4 doesn't seem as good either. I liked my mouse aim for the arms from MW3.
MW5 looks like it brings back the Mech feeling though. Looking forward to that. Roll on 2018. Lol
I've watched a few minutes of videos of MWO, and it looks dull. PvP Mech fights, over and over again. MWO with PvE would be amazing.
Imagine if MWO was more like ED, but with mechs, and obviously less space flying. Lol
I want to be incredibly hyped up about MW5 but it's coming out of PGI and while they've got different people working on it, I'm going to withhold my excitement until we see more out of it.
There is a four pack of MW1, MW2, MW3, and MW4 with the expansions floating around online that has been fixed up so that it all works like a charm on modern computers. I don't think you can run any mods on top of these games since they've been tweaked to run on new rigs but if MW3 is running like garbage for you regardless then it can't hurt! I wish I could remember the name of it but I found it pretty quickly while digging around for the MekTek MW4: Mercs release. It's still on my system at home so if I remember when I get back in a week (or if you can remind me!) I can look it up for you.