Agreed, I've thrown my opinion out several times but I still say doing a map reset is the best option in my opinion, still with the amount of unfinished changes that are still being implemented ( though totally my thoughts ) sure, doing a reset will have it's negatives and pluses, but the same goes for not choosing to do one aswell. Like @OtherGreenGamer said, there's going to be people pissy with whatever decision is made; reset or not. Currently, it seems like the big issue with resetting from what I remember is that people will loose long-hard built builds that aren't protected. Loosing extremely-well built builds sucks and it's super de-unmotivating, but...
The new water mechanics can easily destroy specific builds + it's super easy to flood large areas now. Biome problems are obvious as the new generation features will be exclusively in unexplored chunks and touched/barely touched areas of map, while not a bad thing and encourages players to explore, it'd constrict them and not make it map-wide.
The other big issue I see with resetting is retaining players. Some players are attracted to the idea of one and some aren't, some will leave due to a lack of reset, some leave due to a reset for a variety of reasons, so , from how I see it resetting or not will still bear this issue.
On the topic of phantoms, unless they don't drop anything worth of value or useful I'm completely fine with them being disabled for the sake of making things simple. Right now, they only drop 1 leather and there's plenty of other efficient ways to gain leather obviously. However, keeping the same map saves of transferring over command blocks and spawn, and less drastic changes has to be made to adapt to 1.13 ( though note, while i personally say it's unlikely, if this would be the case if phantoms only would drop leather )
Though, one of my big personal reasons is if keeping to same map, the economy and distribution of specific items among groups of players will get more and more confined. It's been more than a year, and that this point, most of the server wealth and non-mod power is within well-known factions and various vip/vip+ members. Also accounting for the fact that the remaining totems is essentially a monopoly at this point as the market is controlled ( for the most part ) a few individuals. While resetting wouldn't solve the problem as totems would go rare again within a few months time, doing a server reset would place absolutely everyone back on the same playing field and level of power and fully balance out the economy again, not to mention new players having a chance to acquire rare items; such as example, totems. In a nutshell, doing a reset would make everything fair game, however, with a reset, the there would definitionally be an inflation of prices because of things like diamonds, shulkers, and elytras, wouldn't be in immense stock for the first few weeks within the reset period.
Though I'm not any form of staff, personally I'd feel like to do some sort of community poll ( not a acutal poll as bots could easily be used to rig results ) but a question sort of things to ask the players of the community to see what they would think about a server reset, if people say they don't like it one doesn't happen, but if there's more commenting in favour of one, one happens. Though I'm personally in favor of a reset being the best decision, I feel like getting input from the community should at least be a contributing factor.
though I'm not a mod, so I guess we'll have to see what happens