Sim recruiting is now more variable and they could use more effort now than they did before. They will also back off battles they won't win or keep battling if they are close.
SIMs can't offer promises so that's a big advantage right there. So just from that, no they can't go all in. But I bet they can put in quite a bit of effort.
And SIM teams are bad not because they can't or don't use as much recruiting effort as humans but because there is no rhyme or reason to who they go after. They could go for a guy with 1 WE or a guy with absolutely no potential. Or they could get 6 bigs on their team but no true PG. etc etc.