and personally, I think Thanos needed to be reigned in a bit, and Darkseid needed a bit of a boost...I think both trends may well go too far IMO, but...
I'd like them to fill that role where they're each more powerful individually than the most powerful hero...Darkseid should be the clear favorite against Superman 1 on 1, and Thanos against Surfer, Thor, etc. individually.
Any character that powerful can legitimately be a threat head to head with a team including that character, but I don't necessarily want them untouchable by a solo showing from Thor, Surfer, Superman, and the like...Superman should be able to pull an upset, but it should be clear he's the underdog IMO.
Why do believe that it is heading that way? Just curious. The last battle we saw from Thanos is him stalemating someone yielding the full Phoenix Force.