Our visits to Universal tend to be pretty chill compared to WDW. If you stay at Portofino/HRH/Royal Pacific then you get Express Pass. With it, we just pretty much wander wherever we feel like going. No plan at all. We also don't tend to worry much about dining at Universal either, but we tend to eat a fair amount of quick serve food.
I think Epcot Universe will be a big deal, and bring change. Hard to say how much more crowded the older parks will be.
If you really want TS, then you can make reservations, usually they are not essential though. you may wait for table, but Universal is normal, and they will notify you when your table is ready.
I do suggest using the app. You can look at it now if you want to get a sense of park touring.
We did LOVE the new Minions area! If you want to understand the game though, use the app. Link your blaster to the app with your phone. The food is also fun. LOVE the popsicles!
Some of the QS places are worth skipping. We tend to like the HP options, some of the places in Citywalk, and some of the places at the hotels. There are some offsite options too.
A bonus of Easter week is longer park hours. With any theme park, the more you can use peripheral park hours, the better. Also look for ways to zig while the crowd zags. The crowd currently arrives on a weekend, starts at WDW, then goes to Universal towards the end of the week. If you want to avoid peak crowds, don't do that. that's mostly what there is to know. If you want to go to expert level: avoid eating lunch at noon.
Break the eating rules a little. You are a Super Villain! Eat a popsicle/dessert before lunch.
Then again, if we visit US in a slower season, we sometimes also just stay off-site.
The onsite hotels are all pretty nice, and the transportation is easier than WDW. We often just walk, but the boats/buses come frequently at Universal.
Oh, we often just skip the water rides. You will get rather wet, so dress accordingly. Of universal's rides though, they are just so-so.
