SabreMir 2.3 will remain un-changed and will continue to run until the players have had their fill and either moved to another server, or to our Crystal remake. At no point will 2.3 be wiped, but the crystal server will be, once ready for release.
Funny you should mention that, I am currently working on an event both to encourage some new players and to assist with current players progress. Should hopefully have something ready for the weekend.
Also, i must laugh a bit, i remember this problem well, it originated from the original database being restricted to a max integer of 65535 (or something around that number) which ment the exp capped out at 65k along with HP. Most of this was balanced through drops, in that although the exp doesnt increase much, the mobs defense etc does, but with this, better drops.
Now this was actually resolved at somepoint but the database was never re-worked and updated. so this could could be altered however would effect the game massively and as its something thats already set in its way. I feel this is something i will most probably solve during the crystalM2 remake
Hope this helps.