Generally, poorly.

I'd say do rope drop, and schedule FPs for later in the day. Lines will be long by noon during busy days. I am still waiting to see a post from someone who used to get 6 or 7 FPs per day and gives a positive report on wait times from a recent trip on a busy day.
Was just there last Tues. We used to pull quite a few FP- & have always gone during Spring Break. We used to arrive around 10 am & only RD at DHS to get a FP for TSMM. We did have to change our touring plans & we rode/did filler items. But this is how we did MK on a very busy day during Spring Break:
march 25, 2014, Tuesday. EasyWDW has MK as a 9 & its a recommended park. there was no EMH at MK today. Park open at 9
Walked on POTC, then Jugle Cruise, then BTMRR by 9:45
Cinnamon Roll @ Gastons then Dumbo - by 10:20 The bad thing about FP+ on POTC is that they load FP on 1 side & STBY on the other. We went STBY & had to wait while FP boats went empty.
Pooh - posted stdby said 35 min, got in line at 10:22 - got on ride at 10:47. Rode Tomorrowland Speedway, Stitch, & Tea Cups Stby by 12:09. MK was very busy; it's Spring Break. FP+ kiosk in Tomorrowland was insanely long, there were at least 100 people in line - NUTS!! - and this was at 11:30 am.
We did BOG FP lunch. We had a FP for Splash at 1pm but changed it (at 11:30 am) to Space Mtn. The only avail return time was 8:30-9:30pm. (i tried to see if there was an earlier return time, there were none). Done with lunch at 1:15, went to Philharmagic (10 min. stby, NOT a walkon) There are 6 FP Kiosks here & there were 4 CMshelping guests, there was no wait at the kiosk at 1:20 pm. At 1:52 pm, headed over to Tom sawyer Island. The kids drive what we do, & they wanted to head over to the island. While walking to the rafts, noticed that the posted stby time for HM was 75 min & IASW was 45 min at 2 pm. Watched The 3 pm Fantasy parade then Played the Pirates game, takes about 15-20 min per scavenger hunt. Stopped for a Dole Whip. Used FP for Haunted Mansion at 4:25pm. Finished the pirates treasure hunt (there are 5 maps to be used) by 6:15 pm. Stopped for a Nutella fruit waffle at Sleepy Hollow for dinner. Shopped a little. FP for BTMRR at 7:50pm. FP for Space Mtn at 8:30pm. Then Laugh Floor at 9 pm (10 min stby, had a high of 45 min earlier in the day). Watched Wishes at 10pm. Then rode the Carousel, Barnstormer, under the Sea, & IASW by 11:30. Finally left the park. 14.5 hrs and we are tired. Pretty much banged out the park. At the end of our night, I checked return times on
MDE, Space Mtn was 70 min & Peter Pan was 25 min.
Still don't like FP+. Don't like being chained to a schedule. We went to Disney Quest on Sat & planned late FP at EPCOT. Had to give up my TT FP because rain kept us late at DQ & couldn't get a later FP for it (yes I know they would've been all gone with the old system, but we wouldn't have toured this way with the old system)