This is an example of a formula that is missing the mark.
So you make being 171-189 viable. However, you're breaking the 207-214 range, and not rectifying the 190-206 range. If a lvl 201 can only attack down to 190 and a 220 can only attack down to 190, then what's the point of being 201? No one will twink at TL7 other than 220. And what about 190s? They're not going to stand getting ganked by 220s. They don't now, so why would they if their pvp range remains relatively the same?
With 220s keeping TL6 silent, TL5 will have no one to fear. That's what I call selfish. Making a suggestion to break another level range to create this TL5 utopia without fear of higher level twinks. No one gets that, no one but 220s.