If reinforced buildings stop working, then defenders will have no chanse to regroup. We saw this on TOG base, when all buildings, exept terminal, was destroyed and defense of single outpost not worth of loosing atleast single heavy mech.

Shooting down only repair nodes will lead to the fact that when planning base ppl will simply raise the mount with the height of 500-1500m and cut off all entrances or will rise defencive wall around repair nodes and surround them with turrets. To prevent the attackers from getting up there with terraforming - on the perimeter they will drop up the other buildings with reinforce timers. Nothing but disfigured design bases that will not give in eventually.

lol! what? In current terraforming mechanics "moardor style" bases is undestroyable(main reason - low efficiency of tile teraforming modules). And main problem here is altitude. Attacking base through entrance full of EW and battle turrets with 2-3 repair nodes on each is a suicide for any number of attackers(no matter 10  or 100 bots). The only one chance for attackers to break through entrance is to bring 1 000 plated bots close to turret and wipe them with AoE alpha strike, repeat untill last turret dies (just kidding ).
    In case when there are no chance to get through entrance (with low numbers 30-100 Heavy bots for sure!) - there is only one thing left - terraform wall. But it's not possible with beacon(200 -300m limit depending on altitude and buildings locations) and also with tile charges (various limitations also depending of altitude).
   So, any lame moardoar-style base with 20-30 turrets is undestroyable in current game mechanics, (even with tools  that was used by us last days).
   At least theoretically, do you imagine how you can break through such a defense in the forehead?