Just had clients return at the end of May!
They stayed at Loews Royal Pacific so that they had Skip the Line (STL)
Note that STL does not work at Epic Universe. If you want STL there, you have to purchase a separate ticket for it (my clients did). And it is not unlimited like at Universal Studios/Islands of Adventure. You get once per ride and I think 10 rides are included (only a few that are not).
They did get to do everything they wanted to do. I have heard from other agents that you should be able to do most or all at Epic without it, assuming everything is running smoothly. Apparently they have had some glitches and rides get closed off/on. I haven't read much on it, but that is just what I saw.
All in all my clients had a great time. To me, STL is worth it for staying at one of the top 3 tier hotels. Note that the new Helios hotel does not include STL.
Happy to assist if needed, my email is in my profile.
Editing to add:
There is transportation from all Universal hotels to the parks. Some are busses, some are water taxis.
I really like the Toothsome Chocolate Emporium at Universal CityWalk. I enjoyed Mythos and Leaky Cauldron. Gotta try the butterbeer.