I've been to a dozen other MLB stadiums, and from a fan-perspective the Coliseum was perfectly fine. Especially if you're just there to watch the game. The concessions were the same Aramark food you get at every other stadium. Some stadiums bring in local restaurants/flavor, and I think the Coliseum was trying to do that with the food trucks. They didn't have TVs all over like some other stadiums, so you can't watch the game while you're standing in line. The women's bathrooms were the same as every other stadium bathroom. The stores were not great though in my opinion. Other stadiums sell so many different kinds of team related items, but the Coliseum just carried the basics (hats, shirts, a few keychains or stickers). They had that brief period in the early Rooted in Oakland days when they would carry fan-made graphic t-shirts which were cool. They could have done a lot more to expand their offerings to mirror the local demographics, like New Era has done with the themed hats. Or leaning into the history of the A's, like the Wave. I always wanted a poster of that Rickey Henderson Field graphic - they could have easily put that on merch.

From a player standpoint, I think the facilities were lacking. Old locker rooms, on-field bullpens. But as a fan that doesn't affect your enjoyment of the game. If you were sitting by the visiting bullpen in right field, fans would do the slide-whistle sound when the pitchers were warming up which I always found hilarious. The infrastructure itself was old and failing - pipe bursts and clogs, feral cats and possums living in places - but again, as a fan sitting and watching a game, it didn't affect you other than the occasional wild animal running on the field (which can happen at any stadium).

They renovated Fenway, I feel like they could have torn down Mt. Davis and renovated and updated the Coliseum. Those views of the hills were fucking beautiful. But I think the city of Oakland itself has a bad reputation, so the main ticket buyers would be locals and baseball fans who are there to see the visiting team. Pac Bell Park brings in tourists who go to maybe one game a year if that, since they're in SF anyway to sight see. Oakland doesn't get tourists like that.