How to make Vanguard more popular in lower divisions?

I get it, maybe you just started playing and all you wanna do is MAXIMUM PULSE everyone into oblivion. It's what attracts players in the first place I think

But once youre a few matches in, I think the game should do a better job of emphasising the importance of proper team composition. Players insta lock damage roles and support roles but very, very rarely will you see someone step up in the Vanguard role. I assume this is more prevalent in lower divisions but still

For me, leading the charge as a big hunk of flesh (or wood), soaking damage, surviving the impossible and being made immortal by healers, feels great.

What kind of changes can be made to attract more low level players to Vanguard?