At level 25? I doubt it.
This change triples Minion regeneration and doubles Lt and Boss regeneration. At low levels, regeneration was already very noticeable. This change is oppressive.
A better change, if one even needs to be made at all, would be to scale the increased regen instead of making it static.
I'm of the opinion this change is unnecessary though. It punishes the non-optimized and weak. Making the weak weaker is a way to drive off players.