I'm local, so know that that's the perspective I'm coming at this from.
The park is inconsistent. It's currently a bit underbuilt, and is likely in the worst state that it will ever be right now. You will potentially have to deal with considerable lines and a number of complete attraction breakdowns throughout the day, for rides that are IMO largely equivalent to other parks in the area. There are lots of kinks being worked out right now, with teams that haven't really had the experience of opening a new park at this scale, and one that behaves like Epic does.
The park is also very, very cool. The streetmosphere entertainment in a number of lands is stellar, the place-making that exists is beautiful, and a solid amount of the attractions on offer are impressive and great fun.
I have shared a lot of criticism of Epic Universe here in the last few months. The excitement and newness is beginning to wear off, and the growing pains are especially evident. It's a new park, and a very bold one. It was built with many design ideas that I don't necessarily agree with. But I couldn't possibly deny that Epic, operating at its' best, is a really enjoyable time, and certainly one of the best opening year parks we've seen. It's leagues above opening year DHS, DAK, DCA; Epic is also considerably better than USF, both in its' downtime-prone opening year, and the lopsided simulator-heavy park we've got in 2026.
When people ask the question, my answer is always "How bad do you wanna go?". If you could bear missing out on the park for a few more years, or would just be going because it's the new thing, I'd maybe wait a bit. The park is only going to improve; operationally, visually once the foliage properly grows in, and in the lineup once we see a few more rides, the parade, nighttime show implemented.
If you've been excited for Epic for the past decade, if you've not been to SNW before in Hollywood or Osaka, if you are really interested in seeing this park even if that means dealing with the inevitable quirks of a project that hasn't quite found its' footing yet - then go. With the right mindset and prep, you'll almost certainly have a great time. You might not do literally everything, and you might have to deal with a headache or two, but ... maybe you won't! It could be a fantastic experience. For all my complaining, the park that currently exists is a lot of fun and features some of the coolest stuff across the whole resort.
Epic's main issues are about consistency. If you go in with a loose and flexible plan to see what interests you most, and prepped to outlast the morning crowds that leave of exhaustion by 6pm, then you'll get a very enjoyable experience out of it imo.