I would HIGHLY recommend that you continue to do rope drop and hit the attractions you want to see hard and fast and take advantage of EMH mornings. This is particularly critical at the MK. If you do midday breaks, then plan your FP for your return to the parks in afternoon. If you like to stay until park close, if it is not an EMH pm park, crowd levels improve during the last two hours, so I would not use FP+ then.
FP+ has definitely changed things. I've been there during December (transition) and last month. Standby lines are much, much longer than what you've seen in the past--even as recently as December, when there were still traditional FP. In February (NOT holiday weekend) standby for HM was 60 min, IASSW was 35 min, BTMRR was 70 min, etc.
If you want to ride TSM or Soarin, BE SURE to get FP+.
Again, rope drop is your still best friend!