I actually don't mind it.
These themes are ridiculous and even if they're not filming in new locations each season (and therefore can't have the season name be Survivor: *Location*), I would prefer to just have a regular division, with no theme underlying it. Or at least a return to an age/se x division would be nice.
So when the theme isn't emphasised, it feels more like a regular divide to me. I just forget that there is a theme.
The bigger problem why we don't remember the players' original tribes is that there was a swap really early.
I've always wanted them to go into the merge from 3 tribes, and was happy when it happened on MvGX, but it would be really nice to have a season ala Tocantins, where it's just 2 tribes with no swaps.
Or, what I would love the most, is that they finally did a later merge, say at F10, which would allow an 18-player season to have 4-6 episodes with original tribes, and then 2-4 with swapped tribes. We would get to know the contestants well, and it would be a great throwback type twist!
This is really OT, but I just wanted to discuss this.