The Problem is here players seem to enjoy the grinding and in some cases it is even mandatory at 5 rep per seed and there is no other noticeable activity you could do in the first week of a patch - I get you want to time gate to have the zone last longer, so ppl stay hooked, but that is designing it for playtime matrix. Instead of time gating the content in a zone, have every few weeks updates to a zone (doesn’t have to be huge content just some neat stuff maybe additional renown levels with other rewards) to keep them refreshing, that way you create long-lasting content.
See it this way as well - if you want to gate it, make it at least worth the time and also get rid of that RNG Superbloom of the 250 Rep and balance it at 375 Rep.
For the Seeds after the 5th, reward players with 15 Rep per Seed up to 30 depending on the seed quality - 5 Rep per Seed isn’t worth the time which makes it dead on arrival and will result in players less engaging with it. It is a good thing out of my PoV if players actually engage with the system because it was fun doing and your time as a player was valued (20 - 40 Rep).
You somehow managed to nuke a Rep Grind PPL enjoyed doing and replaced it with another “weekly”. The Game really needs engaging Content for those that have the time and want to spend it in the open world. With Dailies becoming bi-weekly you really have no daily content in the game anymore besides Dungeons.