ALright, so I have played a high level in the outskirts, but when doing so, I opted to take the role of trying to generate rp and plot. I think a lot of the issues stems around a few things, this belief that once you hit level 14 you HAVE to leave barovia (this is new to me, if it's a rule please show me the post with it.) What has been done was to limit and cap the rp exp gained by those of higher levels. Now that's not to say that the entirety of barovia is that way, it's only really western barovia, eastern barovia is untouched. However it makes little sense to really linger in the village due to the nature of the place itself. So where does that leave higher level barovian/gundarakite to go? It gives you a push away from the natural setting, and forced into another domain or to populate a tiny village that is supposed to be pretty empty. The other options is to continue where it makes sense for your character to be.
A high level in the outskirts doesn't need to involve themselves in combat or A/MPCs. I actively tried to avoid them on Erzsebet for the reason of my level and I felt it would be better off for the lower levels to hunt. Sure if asked erzsebet would share her knowledge, which is what someone in that position of a high level (in my opinion) should do. We can either be an issue or we can take the higher road and try to act as mentor, leaders, guides, crafters, etc. They can create and generate stories and give low levels guidance or things to do.
If the issue is about high levels going to the low level areas to destroy monsters and solo, they may be going there for a type of crafting material that you can't really get elsewhere. Demon horns are only in lysaga and perfidus to my knowledge. I think there's some in the rakhasha dungeon too? There is also the possibility that while they are a high level, or have enough UMD to use scrolls, they aren't familiar with other areas that could provide what they are after. Albeit if it's for crafting, the easiest solution is to hire lower levels to go there and get it. Even go there and buff them so they can clear the dungeon.
POTM is a roleplay server, it's not a mmo, it's not a combat oriented server. It's designed to put roleplaying and generating stories first. Sometimes with crafting, especially if you are starting out it may be cheaper and easier to solofarm places that provide those materials. Ultimately it's not so much an issue with the server, more so a way of playing. Maybe there are people who want to solo things and just aren't aware of the action server which (I think?) was designed for that sort of thing. Or perhaps they don't have a huge amount of coin o buy things needed. Also herbs are often in dungeons and with the way invisibility now breaks if you fail a check, any mage that wants to gather those dungeon herbs has to either buy them, hire someone to get it, or brave the dungeon.
I think the best way may be to simply treat it in character, ask why they are doin what they are doing, ask if they could take you somewhere stronger for the whole crew? Use it as a means to try to find some new rp. If there is something happening that is truly detrimental to the setting the dm team aren't really scary, and they can help.