Why should I be excited for reworks when they haven't done me any favors?

Riot does not cater to the play styles and philosophy that I enjoy that is brought out mostly within my oldish roster; strategic niche and a lot of situational value. They want, and you want, mechanics. Flashy outplays and looking-cool-ability. Shit that lends itself to generalist designs that make them good to one-trick. Just off this alone I should be worried what's gonna happen, but I've already had it happen. Just going down the list of champions I either mained at some point, or just had a casual interest in but no longer play after their reworks (because of their reworks);

There are a few champions who got reworked that I would say are just as good or improved, but given that I already played them before, I wouldn't say I really gained anything. Varying degrees of success, some I still hold in poor regard;

I think the only champion who got reworked in a way that made me pick them up when I previously didn't play them, and also add them to my permanent roster, was Illaoi. I don't think you'd even consider that a "rework" because for you a rework has to actually replace the original champion entirely - but after her retuning in S6 she went from a champion I hated playing to someone I have several hundred thousands of mastery on and has been my most played for 2 seasons straight. So, to be fair to Riot, they did me good on this one.

But that still remains, I've lost far more than I've gained from Riot reworking champions I have an interest in. I can't really be upset about Mord because I gave him up in season 5, so worst case scenario I still don't play him. But Volibear? He's coming soon, and likely unlucky for me he'll be in 2019. I've got a modest amount of games on Volibear, and I can already feel it in my gut that he isn't going to get what I'd consider a -good- rework; something that actually resembles its predecessor's kit and fantasy and just builds off of it, like Warwick or Eve or Irelia. He isn't popular and he doesn't have a kit that could be made marketable to a big audience even with fancier VFX. He doesn't have a big enough playerbase that a lot of people can communicate what they'd like, but he's still enough of a pubstomper that people who dislike him can all come crawl out and shout about what they don't like and sway the entire discussion into their side.

I don't feel compelled to wait and see how it turns out; I despise almost all of the reworks Riot has done from the class updates to the VGUs. There's like, 5 of each, maybe not even that, that I would say turned out well. I don't like the people who head the rework teams, I think they're horribly incompetent and over-stuff their champions just so they're sure to do well and sell, and I know that I won't get the dev I want the most because the dev I want isn't even on the rework team anymore.

So what, exactly, is the reason I should look forward to this happening to me again? When my roster of champions will just continue to slowly shrink down until I get frustrated enough to quit over it?