Wouldn't an alternate power source potential change the logistics of those suits? I know such things tend to be taken seriously by even hard-science sci-fi writers, so I don't think we can discredit them entirely. Perhaps the best way to handle it would be to not have every one of your soldiers using them. I can see how those suits would be useful in urban combat scenarios where you are clearing a heavily combated area where things like stealth and maneuverability that traditional ground troops have benefit from whatever armor, strength, or heavy weapons advantages the suit guys have.

So you send a guy in a suit, maybe two, who can take the brunt of the fire (well, at least small arms fire. I imagine they aren't going to deflect a tank round). You are still using traditional infantry as the backbone of your military of course.