[Falstaff]

i suggest to start by adding the figure of the tamer (pvm)..

here is how it may works:
add some tamable creatures that can fight only in pvm
maybe followed by a quicker increase of the skill till 70 (but not necessary), interesting instead should be to set the rare mounts tamable only with 90-100, where at 70 you could only tame for ex. something you can already use for pvm and train it slowly to raise his skills and get stronger

i think around 30% of players play tamer for pvm in every server, and in somewhere also for pvp (not this case btw, and i like that rule)
anyway this is to highlight we're losing a good amount of player just for this lack..

i dont think this has any affect on player base. Players don't go oh look they have this feature and then join a shard.