I understand the point that the current Vanguards are supposed to be easy to pick up, jack of all trades types but it would be nice to have a more difficult, versatile vanguards for all the factions as well. I've known for quite sometime now that the plan is to make 2 of each type of class per faction and 1 of each kind hybrid per faction as well, making a second vanguard would introduce characters that are versatile but are for more experience players who like the jack of all trades playstyle. Their moveset doesn't have to be considered Hard to play just not considered as easy as the other faction's Vanguard. There are also a lot of versatile weapons to choose from.
Overall just a personal thought.