TL;DR:
1. Add a Bite Combo for BRD kinda like the one from PvP to replace dots and Iron Jaws; freeing up hot bar space.
2. Foe's Requiem for BRD being on the same resource pool with other skills would be a huge problem. A possible fix is remove the mana drain from it.

Battle System Change Request: (PvE) I wouldn't mind the PvP combo system for some actions like the dots from BRD. (Venom/Caustic Bite and Wind/Storm Bite) I would call it the Bite Combo. As in first dot would be fired, then the next would be fired similar to me just pressing both of the buttons in succession like I do now. While the dots are active, the button for the combo changes to Iron Jaws to re-apply the dots before time runs out. If time runs out, the button changes back to the Bite Combo. This still has the player needing to pay attention to dot timers and not waste the time performing an extra action having to re-apply the dots when both could have be done at the same time with Iron Jaws. This thought would free up 2 spots on my hot bar.

Single Source for skills: Would I freak if everything went to MP? No, but I do have a concern about Foe's Requiem as it's an MP hog. If I were to play that, while needing to use the same MP pool to keep attacking with my other skills, then I would become a useless party member real quick. With that, I expect changes to be made to compensate for only having MP available to play FR and use other skills. For now, the only idea I have to fix that is making it so it's just a timer without draining MP.

thanks for reading!