It is a simple commercial decision. The developers need to recoup the cost of R&D involved just like every other vendor. You have the inbuilt animated GT titles that work in vMixHD. Of you want to be able to do custom designs with animations you buy the higher edition. Or buy another bit of software (i.e. NewBlue Titler4) at significantly higher price to make those animations.

Either way it is now your commercial decision as to whether you have a business case to upgrade editions.

"I don't need 4k or Pro"

yet you want the advanced feature of GT....therefore you DO need 4k or Pro. Don't worry about 4k being the name, you can still do HD productions, its just a way to differentiate the licences.

We need to support Martin and his team if we want to continue to expect such a great product with updates and constant improvement. It's a small price to pay for such a great product. They are already way under what any other product for switching, streaming, and graphics and even instant replay would cost. If we don't support them, and vMix goes away, we actually end up spending more money for other products to do the same thing. Long story short, its not a lot of money for what we get, support them and they'll support us in the future with constant improvements.