Welcome to the board, @fastlawrencetime. I ended up playing the campaign and loved it. Some of the most fun gameplay in a Halo campaign to do. Story was solid enough for what it was -- trying to fix what Halo 5 did.
As for the online, I did go on a month+ hiatus from playing online but jumped back into it this week with the Cyber Showdown event + Attrition mode. It's such an easy game to jump back into.
Store items are crazy overpriced, and the rewards / progression needs a lot of work. Hoping they solve it for those who utilize those. I couldn't care less about cosmetics though.
As for the maps, the designs are great, but definitely lacking. They can definitely afford to add a few more. 🤞they bring back some from the Original trilogy.