In my opinion the option of resetting the McMMO is probably better, even though some are already have high levels on it i think it's better than remove or reducing things on the server.
The Towny plugin reset is kind of still in question on how it will impact the server. In my understanding if this is only affect the things like claim area and the system of the towns then i'd say it's even better than the McMMO reset because we'll just need to re found our town, rezone our town's area, set up the town hierarchy again, and abandoned towns will be gone since they are not founded again. But the "still in question" part is just like what Oplegoman said, would this reset everyone's money on the server?. Resetting everyone's money is a pretty important thing, i don't need to explain why, and even if there is a plan to just give everyone's money back to their correct balances i'm sure it's going to be heck of a work to do.
Removing all minigames
For me it's pretty okay since i don't really play them but for the many players i'm sure it's not so good. There is still some times where players plays in the minigames and even new players usually asked about the minigames first even though they will go to survival or leave the server since no one else is playing with them. But i do say we shouldn't remove the minigames if we can.
Remove skyblock plugin and worlds
Now i don't play that much on the skyblock either but many players spent their time more on Skyblock than survival, removing Skyblock is like removing a different survival world that will end up with players loosing everything that they have gather on the server. I say we need to keep Skyblock, it's an important feature of the server.
Remove Dynamic Map
Ok about the Dynmap. I know that many people is not using it, which is a shame. But dynmap is a very good thing to have on the server. Dynmap makes planning easier from build planning to claim area planning, it also makes it much easier to find a nice, unpopulated areas for new players to build their home. When i come to this server, i didn't know about dynmap, i go to survival world and just try to find a place to settle in. After i found a nice place to settle, i poured my time and resources there, building many things. A month pass by and i just realized that the place is pretty much populated, i can't claim more land to build more things, i've made a huge mistake. Not only that, seeing my place on dynmap i also realized that it's kinda close to the spawn which explain why there's many griefing happening in the area. The only thing i can think of to achieve my goals is find a new place, move out. With the help of Dynmap i found a really nice place for me to build and i even just found out that there's world border. At some times i even help new players find their place for home that is not already populated with abandoned buildings. Another use of Dynmap is finding biomes, sometimes the biomes near spawn areas are just depleted, i fortunately find a dessert biome not far from my base that still have cactus with dynmap.
Why don't just use regular map? It's annoying and time consuming, i'm waking down hill and when i look down there's a huge map blocking my view, making them is a bit time consuming and the information you get is just not as complete as dynmap.
Well i've reached this point of defending dynmap but i do feel that it will be the one being removed which is really unfortunate and i'll probably feel kinda blind after it's removal. I won't be able to plan my build easily, found out that someone is waiting on my roof to kill me, find biomes with unique things, get an overview of my and my neighbor's build so i can detect a potential griefing, share the progress of my build to my friend through my phone, it's just sad for me.
Reducing player limit to 20 and reducing server availability to 12 hours a day is just not acceptable, it feels like a huge downgrade for the server.
So my point on my opinion is, the "reset" options are better than the "remove" or even "reducing" options since the reset options, even if it means the reset of progress of players specially in the McMMo option is because you can achieve this progress again which is not that much of a deal than restarting from the beginning after your island is gone, this bring some kind of replayability, a new set of goal while playing on the server. It feels better than the removal of your favourite games, your floating island, your daily used pairs of eyes on the sky, or even the limiting of your playtime on the server or even chance to play on the server at first.