Unfortunate that it will be havily restricted. I understand why they are doing it this way, but it seems like if you are on PC, there isn't much point to waiting for this to come out. Just mod your game now and have at it.
You mean the closed access?
I think it's fabulous. They can get feedback from the actual people doing heavy lifting (especially the framework maintainers, I presume) and make drastic changes before a real release, without blowback from jankiness.
I wish more studios were that in touch TBH. Many heavily modded games (Stardew Valley for one) do work closely with framework creators, give them early heads up and such, it's just kinda taken for granted by the larger community and not trumpted.
Rule 0: Be civil
Rule #1: No spam, porn, or facilitating piracy
Rule #2: No advertisements
Rule #3: No memes, PCMR language, or low-effort posts/comments
Rule #4: No tech support or game help questions
Rule #5: No questions about building/buying computers, hardware, peripherals, furniture, etc.
Rule #6: No game suggestions, friend requests, surveys, or begging.
Rule #7: No Let's Plays, streams, highlight reels/montages, random videos or shorts
Rule #8: No off-topic posts/comments
Rule #9: Use the original source, no editorialized titles, no duplicates