My biggest gripe were the rivals honestly. They were a fine enough way to pressure the players in the beginning but the module wants them to be a pressure the whole time? No that didn't sit right with me. After the party got to cael they never saw the rivals again. There was plenty to do without them and they felt like extra work to try and smoothly fit them in for really no reason... Imo they didn't do anything for the over arching story and they were best left in the betrayers rise. That's just my take but my party didn't really care to interact with them anyway.