Yeah but I don't see that change as a bad thing. It doesn't change the demigod-demigod balance, it changes your map tactics a bit more.
Sure it does. When Erebus can bite you as you chase him near a tower and you take additional hits because you're snared and you take more damage because your armor is reduced, the increased damage clearly changes the balance of that fight.
Also many DGs are weaker or stronger at different points in the game. When towers allow weaker players to coast to the points where they begin to bloom (sorry couldn't think of a better word off the top of my head) it changes the overall balance of the game pretty significantly.
Preventing a kill or two between 5 and 8 can completely alter the way a DG is played. Also a DG like Regulus is obviously empowered by high towers and unsurprisingly most of the time I see high towers a Regulus host is the culprit.
All tower modes are worth trying out now and then for a change of pace.
No moreso than other game modes are worth trying, and I rarely see people hosting fortress or dominate games.