No, it locks your models into a single system. Honestly limiting yourself to play one game system is I think a bad move.
What if you move location and no one there likes KoW, or your gaming group/area choose to play a different game? We live in a great time for fantasy game systems, there are loads out there that each offer their own appeal. All my armies are single models so I can sample these systems without having to buy a new force.
I understand that a lot of people here are advocates of multibasing, and I think I am in the minority, so I don’t think you’ll hear many other opinions other than support for multibasing.
Yes, multibasing allows for dioramas, but sometimes it gets a bit silly. Units of human sized infantry mounted on pieces of base decoration that is about 6". Just ruins the emersion and can result in people thinking that they can’t see over the unit, where in fact in the rules they could.