Yes, I doubled the hit points of Infantry and that at least makes them useful to soak up attacks. They are also fairly versatile as they get 100% vs Land and 80% vs Air (although their basic attack damage is weak).
Infantry's problems are they they are slow and that have a 50% upkeep (compared to ~25% upkeep on other units). But with the doubled HPs they provide a need amount of beef to a force. I also buffed up the attack values on the APCs a bit (more to represent BMPs and Bradley's more than BTRs or M113's). This also makes infantry a bit more attractive to use since it helps remove the major penalty of slow movement. A stack of 5 APCs carrying 10 double-HP infantry is actually a fairly respectable force.
But yeah, in the standard rules I dont know why you'd ever bother with Infantry or APCs or Fortified Positions....
