in real life combat, u dont really pickup enemy weapons, even if theyre heaps better than ur standard issue one.
cos in real life fighting, theres just no time to pickup enemy weapons and then strip of all their ammo. and anyway, youv been trained to use the gun ur issued with :P
tactical points are awarded faster at the start, to make hte game harder as you go along, they make it so the tactical point income comes in slowly. so stop complaining
on last lvl i didnt even use tanks. just keep sending riflemen and asssault men. and use support to keep ur men from dying. once u have taken the first trench its easy