Yep, one for the suggestions section.

Why not implement something that increases the damage resistance and damage output of the team that is down a player? Something that still allows your team to compete even though you are down a person, and to make it fair, make it so that this boost only applies when your team is losing.

Something like that is highly exploitable. Way back when Blast Network was popular, I specifically remember getting a bad taste from GvG because some guilds would force their players to leave at the beginning of the match so that it would turn into a 1v4. The team with one person would have an advantage because it was easier for the team with more people to 'lose' points (getting killed, team kills, suicide) than it was for the solo player.

In the same way, force your teammates to leave and now you have ultra players left on your team, and they can manipulate their points to be under your team's while they farm kills off of you. It's pointless but completely aggravating when you're on the (real) losing team and know the other team's just playing with you.

(btw, forgot to say before, but use the <em> and </em> tags if you want italics ;P)

edit:
Honestly, the only handicap that would make sense without making the aggressive players even more annoying is to increase the team's capture speed.

:|

What if it becomes a 1v6?

One of my ideas was to decrease spawn times for members of the disadvantaged team or increase spawn times for members of the advantaged team.

I also had the idea that monsters would show up and fight for the disadvantaged team (They cannot capture points). Maybe boost their health too for every player on the other team(equivalent to elite difficulty health and damage output). They would be on a respawning monster pad around the map or on the points.
What I would really prefer is to have lockdown AI bots that can play well, but if we have ones that can't really be viable in PvE, I wouldn't ask for something to be completely reworked anew for PvP.

What are you talking about Fangel? That's blasphemy. We all know LD is just shooting people and stabbing them repeatedly.

I like the idea of monsters. Would they be random, or like always Lumbers or Trojans or Giant Lichens or such?

Players will fight the the enemies as they are a threat, no matter how small. Your flourish tactic won't be helpful on mecha knights, and you can't shield any attacks as a striker.

The enemies could show up in comparison to how many players have left. A single griever and lumber could spawn on points when one player leaves, mecha knights can spawn once two players leave, gremlins could spawn when three players leave, howltzers can spawn once four players leave, trojans and silkwings (that heal players!) spawn once five people leave. These all add up, and can be status-based to the team color, and have the team color under their feet as the team does. (Green = Poison, Magenta/Red = fire [curse would be magenta but there's barely any curse-themed enemies], yellow = stun/normal, blue = shock, cyan = freeze. Other colors can be similar, but I can't think of any more) Maybe having phantoms would be good, too.