You've almost described my same situation, and I'll try to address something I was discussing with
@Officer_Charon earlier.
Usually Blizzard leaves only a week or so between seasons, but this time they're allowing it to go for almost a month. They've said this is for "reasons," but I assume it's to allow for the 4th holiday and also to give enough of a buffer in case the Necromancer turns out to be too OP and they need to make some adjustments before the next season starts.
Once the seasons begin, everybody gets a sense of urgency because the clock is ticking. There are rewards that can only be unlocked during seasonal play (such as the extra stash tabs) and that urgency (and the fact that you're starting over again from scratch) makes the game feel almost brand new again. Non-seasonal play can feel boring because once you've unlocked everything, about all there is left to do is to push rifts, which can make the game feel more like the traditional WoW raid/grind experience (not that there's anything wrong with that).
Personally, I'm taking this break as a chance to try out the Necromancer when I can zoom him all the way to max level, find him some gear to try out all the sets, etc. That way I'll have some experience with him, know how best to exploit his gear, playstyle, etc., by the time season 11 opens up. Season 11's plan was only just released within the last 24hrs, so
now we finally know what's coming up.
Oh, and I got my very first primal legendary this week! So there was some question before about the requirements for primal drops, since you have to hit GR70 solo in order to unlock primals, but primals didn't come out until season 10, so did you have to hit GR70 again after season 10 in order to unlock it? We now have definitive proof that so long as you have hit GR70 solo at some point in the past, you have unlocked it. The game knows, somehow (probably by checking your blood shard capacity). I avoided GR70 in season 10 just so I could test this hypothesis (since I DID hit GR70 my first time in season 9), and this also means that all characters in your quadrant* will benefit from the unlock, not just the individual character who completed the rift.
--Patrick
*"Quadrants" are softcore seasonal, hardcore seasonal, softcore non-seasonal, hardcore non-seasonal.