I kinda stated in some posts above this one, but every mode in this game, from PvP to PvE, provides the most entertainment and enjoyment in a group of 5.
When you lower the number, the less fun it becomes.
What sort of performance issues or balances or problems could there be that it must be a 3 man mission? Once the number drops to 3, this is where the balance may actually be an issue when it didn’t really exist in a 5 man. In the current PvE missions, it’s encouraged to go with 1 Tank, 3 DPS, and 1 healer. In reality, you can go with whatever combinations since each could cover strengths and weaknesses of the other heroes. 5 man allows you to go with these mix ups for trial and error and still have the mission succeed.
In 3 man, this is not the case. If the structure requires 1 Tank, 1 DPS, and 1 Healer, each of the classes chosen have to perform their part more than adequately, since you don’t have additional friends to cover for you if things go awry. Certain characters can DPS much more steadily than some, some heal with considerably better consistency, and some tanks can defend more reliably than the rest. The team composition becomes more rigid and less flexible. Some of the heroes, as a result, may be played even less in PvE. Therefore, I don’t see how some of the heroes getting even less represented while you’re playing with fewer friends is a good thing.
And Gearbox is trying to sell to us that idea of a 3 man is a worthy experience. That it’s gonna be fun. That there is somehow more replayability.
Less may be more in some circumstances in life. However, for this game… I’m not seeing that to be true.
I’ll cast my final judgment when I finally see the end product. Until then, more cautiousness from me.