Even trolls and skeletons with speed 11 and 20 HP used to run around ;) The heroes are great, but they are different now. For example, the Armageddon spell in SoD and WoG has different strengths.
No need to exaggerate) The speed of skeletons and trolls only increases by 1 with rank (from rank 7 to 10). And skeletons have a maximum of 18 HP, and that's only at rank 10, with Galtran and all the HP artifacts. In general, the point of WoG bonuses is that they are difficult to achieve in a minimal amount of time. And this is where true skill manifests itself - who of the rivals is able to conduct a greater number of meaningful battles in the same amount of time.