Thank you all for your responses

It's nice to hear that heroics and even raids are possible rolling with 5x dps. I was afraid pve would be almost impossible with my team composition.

In regards to IWT, I did actually see the post somewhere on here about using 2-player mounts to get around in bgs. However, the post was from a few years ago, and I was afraid that it may have been hotfixed by now. Definitely glad to hear that it hasn't! The future is looking brighter than I expected