The amount of regeneration made present in cubecraft bedwars is (In my opinion) is to much. Say it is at death match with 2 teams, both teams having one players left. When both teams are at mid, (Lets call team 1 the team with over powered regeneration items and the team that has not been getting staked team 2) and team 1 has gotten staked with regeneration totems, a regeneration hat, AND the team upgrade of regeneration boost. It is almost impossible for team 2 to kill that player. The only way to counter regeneration items like this is with TNT, because of its high damage it can practically one shoot any player no matter what. The only problem with this method of kill regeneration staked players is that TNT is very, very slow to exploded in CC and it is easy to avoid even during death match. All one has to do is to stay away from it, or place 1 block of WOOL in between them and the TNT to stop all but 1/2 a heart of damage. You may think that more TNT would help with this, but team 1 can still run around all the TNT that team 2 may be placing.
The only real piece of regeneration that is semi difficult to obtain in CC BW is the regeneration hat and this can be solved by getting the faster generator team upgrade. Getting the faster gens also makes getting a absurd amount of regeneration totems possible. To get both the team upgrades of regeneration boost and faster generators one only needs to go 4 out of the 5 diamond gens at mid once! And lets face it, most games you can do this very easily.
So having this amount of regeneration in the game makes it very unpleasant to play and very drawn out. I am not the devs so I don't know what would be best to change but I did want to point out this very blatant problem with CubeCraft BedWars.