Like it or not, you're getting 5 seasons. That was the Estate's requirement upfront for whoever won the bidding war for the show.
Amazon won the bidding war by bidding LESS than Netflix (they wanted to do Marvel LOTR with multiple series joining up into LOTR Avengers which freaked out the Estate), but letting the Estate and Trust oversee the series. HBO was rejected when they just wanted to remake LOTR but in HBO style with lots of sex and nudity.
Those others do sound more superficial. Although all are following trend, not leading.
Prequel material leading into established stuff has been done intensely for decades with established IP, tired method. This character could've been another wizard opening up the south and east of ME. Setting up the world for future storytelling. Southern nations and further east. Even just using the map of the Earth as a guideline, from evolutionary history to overlapped with colonialist and current geopolitical events gives so much sublimated inspiration to distill from. Even go as far as Australia to introduce new sentient species.
Maybe since they're locked in contractually they'll take more risks in the upcoming seasons. Develop a concurrent storyline with new characters to test response a set up to a series that takes place in other parts of future ME.
I get the sense the younger generations want more sophisticated ideas reflecting a better understanding of the natural world. These don't necessarily have to be launched from the fictional worlds of these IPs, but can encompass and evolve them. Not prequels on rails leading into stories they know, like older generations did.
If there was some hint it would be leading into new territory on ME it would make it more appealing to watch.