Here are my thoughts on this private server.
Pros:
1. PP-to-TP Conversion Mechanic
By default, cash shop consumables and cosmetics can only be purchased with TP, but PP can be converted into TP at a rate of 150 PP : 100 TP via the Popo Point Shop here. Non-spenders will have access to spender-exclusive items so long as PP can be obtained by passing time in this private server.
2. Rank 10 Class Era
While Rebuild solidified the niche of each class, synergies between classes were weakened and jack-of-all-trade builds were extinguished. The rank system is arguably the main attraction of this private server, as you are given the freedom of choice with class building without any restrictions in status point allocation.
Cons:
1. Removal of Rank Resets
The server administrator recently announced that both the Reset Helper NPC and Rank Reset items will only be available until 27 October 2022. The scope of removal of rank reset wasn't clearly defined because no other details were provided. However, even the official server is more generous at rewarding class resets than this private server.
2. Mass Censorship of Perceived Negative Feedback
My questions soliciting confirmation or clarification of the announcement on rank resets were deleted based on their loosely worded rule that no divisions or turbulence within the game are allowed. In particular, both Thai and English language channels in their Discord server had been taken down for some time. When the channels in question were reopened, all statements criticizing the removal of rank resets were nowhere to be found. A friend of mine was also locked out of his game account for providing feedback. Proof of censorship can be viewed here:
https://imgur.com/a/2mwVyAc.
3. Occasional Server Lag and/or Rubberbanding
In high-pressure situations such as Stage 5 of Challenge Mode, latency spikes with damage numbers are noticeable. The official server suffers from connection and client optimization issues to this date, so perhaps not much can be done about them in a private server, especially in an older version of the game.