I'm seriously enraged with you for supporting the implementation of such things into a legendary game such as Legions.
To be legendary I think you need to have more than a dozen players.
Alright, let's talk shop for a bit. Legions has very repetitive gameplay and it's very simplistic. If Legions were an RTS it would have a single building where you produce a single unit type, some of which you leave at home for defense, others which you send en masse to attack the enemy (like the Blood custom map for StarCraft). The gameplay is relatively static when compared to Tribes - and yes that is a proper comparison. Yes I know everyone likes going fast and ZOMG DOWNJAT but that does not make a game. Hell, Call of Duty has more content and dynamic gameplay than Legions, Black Ops even has primitive deployables. When it comes to pubs Legions is even worse. It's just a constant (llama) cap train. And before anyone says, "pubs aren't how the game is meant to be played!", screw you. Tribes had a million people playing at one point. How many of those were competitive players? 1%? If you want to tailor to 20 competitive players in Legions and no regular players, have fun with a dead game and boring competition.
So let's talk about what I'd like to see Legions become. First off, base assets. The holy trinity of generators, sensors, and turrets. Without power the other two are useless, without turrets the safety of the other two and your base in general are compromised, and without sensors, at least what I always thought sensors should do, your turrets are less effective (slower tracking, shorter range, whatever). Of course inventory stations as well, but I couldn't fit those in the trinity otherwise it'd be a quadinity and that isn't a word! I have a lot of opinions on what would constitute a good turret in Legions, but I'll leave that for another time.
So what does this do for the game? Well it removes the sole focus on the flag. Your base is at least as important as your flag. If you can't keep your flag safe you'll probably lose, and if you can't keep your base running, you'll probably lose. It would no longer be a case of, "Is the flag at base? No? Get it back. Yes? We're good" (simplified of course). There would be many other variables to consider. Deployables would mitigate, though not remove, the negative effects of a good base raping.
So yes, I think Legions can be improved by leaps and bounds rather than relying on DOWNJAT as a game mechanic.