I've finished it now and I didn't mind the finale, so I would still recommend it to people. It's the worst season since the first one, but it still ends on a 7/10 episode for me personally.
Mystical, quasi-religious, supernatural bullshit that leads up to it aside, the final scene is sufficiently emotional and a good way to end the show imo, given all the hellish stuff the key characters went through together over the course of several years.
On a related matter, I'm perfectly happy to watch shows that are atrociously written towards the end, or which have a widely hated final episode. Dexter, for example, Game of Thrones, or Mr. Robot (which had an even worse final episode imo, though most fans loved it for some reason). I'm really glad I watched all of those shows and love all of them. The final hour isn't as important to me as the show as a whole and consistent quality across the course of dozens of hours.
Maybe for you personally, but the general consensus is that the final season and in particular the final few episodes irreparably destroy the continuity, making all the stakes built up to that point completely moot and worthless while pissing away one of the best character arcs for cheap (and re-used) gimmicks. The show, including all the seasons I truly loved are now un-watchable for me and the memories all tainted. You might be satisfied enough with that pretentious garbage but I'm not and would've liked to be informed before investing myself into the series.
The final episode has a 6.9 rating on IMDb, so not far out of line with my opinion, though I'll grant you that I'm usually a much harsher rater on there than most and find IMDb ratings to be slightly too inflated. It's episode 13 of 16 that most fans hate, because of the character death you touch on in your post.
And my recommendation, such that it was (I wasn't necessarily recommending it, just saying I was watching it and was glad I'd stuck with it through the teeny-fest initial episodes), was based on my opinion in the first place, so...