Yes, and I believe the hrs. are still 1 - 7pm. There is also currently a meet and greet with Kylo Ren( was previously Vader when we went in Dec.) at HS in the new Star Wars Launch Bay, where your Disney Visa gets you in a shorter line, kind of like a FP. That is available from 11 am - 4 pm.
Just did this last week. We visited the Character spot at Epcot right before doing the Visa meet. Unfortunately Mickey and Goofy were at both locations. My daughter got a kick out of it though since we told her they liked her so much they were following her around.
No, they were seperate. Baymax was about a 10 minute wait while we were there and it was about 40 minutes for Joy and Sadness at about 9:30 am. It was just Goofy and Mickey while we were there last week but they state it can be any characters of their choosing.