I've had many years to adjust to my new plumbing (24 years), but here are my answers:
Do you still get butt burn?
Infrequently, but it can happen. Generally if I eat a lot of acidic foods, it can happen. When I used to eat granola or high fiber of that sort, it was like sandpaper coming out, and could irritate me. However, my irritation these days stem less from what I eat and more from occasional fistula output around the seton, so I do opt for some ointment here and there.
Do you still use cream each day daily?
As per the previous question, no.
Are the toilet trips lengthy? (Amount of time spent in the toilet)
No. I can usually be in and out within 10 minutes or less.
Are you able to eat all foods?
For 20 years, I ate everything and anything, and I mean everything. Last few years, along with my fistula, have had some outlet narrowing that causes me to be a little more careful with what I eat (avoid large amounts of fiber, nuts, mushroom... things like that), and I also was getting some bloating and discomfort the older I get, so I did the FODMAP elimination diet, and I avoid some triggers I found, along with really lowering the amount of "bread" type carbs and noodles, and rice, and potatoes that I eat. Those foods make things too thick for me, and just gum me up too much, and make me uncomfortable.
Do you have bad days and if so is it just increased visits to the throne or is there pain /urgency also?
Usually have 4-6 BMs a day, rarely ever more than MAYBE 8, but that's rare, unless I'm unwell. Rarely have to go through the night, either. Never have pain and/or urgency.