Why config ?
Spam deal
Some wild "Levels" using new stuff (far from perfect) can mess up fixing SpawnPoint type spam having custom Factory and whatever SpawnPoint to gain random creatures. I won't speak about BSP troubles from those levels and neither weaponry used by those Troopers. For such case we have to avoid injecting new SpawnPoints VIA INI.
Friendly pawns
Other case might be a Nali replacement which will be a hard deal to gain all data involved and will mess up creature if is intended for a mission. Nali mainly run away from player loaded and having more health - so to speak it's useless the mostly.
New stock
MH2_NS_V2 is able to operate replacement for nasty creatures with chances to crash servers. However, my tool MHReplacer for stock monster replacement works in this version too but will except types from MH2_NS_V2. So I think if we want a complete stock replaced (gain teaming) is better to not allow MH2 to make any monster replacement.
Tech - Structure
Said MH2 version is a child of original Domination (order audible is "Search and Destroy"), it's sloping to MonsterHunt2 masked with a place-holder called MonsterHunt in purpose to have a visual appearance in MH TAB (if player was tweaking UT to show MH native). Given new support, calls to game-type won't mess errors it's about "MonsterHunt2(Level.Game)".
MH2 is based on a game-type running a MH Level - is not a very native MonsterHunt but mainly works.
It has rewritten stuff to prevent abusing (armors, scuba, etc.), has powerup support (a combined Damage thing), has monsters bunching at player, has regens

Because I did not like a Timer deal in BaseMutator, MH2 develop a TimedBoy actor spawning in game, we also have link with a music manager - player entering in Level too late will have the same song as the rest of players. Replacement of old stuff takes in account several things which usually not happens.
Counting hunters and monsters occurs each 5 seconds not all the time for each creature killed, Bonus Redeemer and other is not granted the mostly to last player entered as happens in UTJ series, it's RANDOM. Player dead is not regenerated, ammo is rescaled to prevent pickup spam useless (will load ammo rather than only sounding farts), player chicken crouching too much will have a$$ exploded properly.
Mod uses another sort of player - mod is good to debug pathing - yes, we have Bot Support too (later described) so here we can deal with different things too.
Mod supports that MH-Miam type End attached to mover and also support AdvancedMonsterEnd from MH-LostSouls (if you want to mock server with that). Other instances can be also tuned properly.
Bot support
It's available in maps with original functional Bot Support based on New WayPoints against breaking visiting order, Bot is not glad at new carcasses, will shoot them to prevent corpse creatures showing up, will be a bit polite around teleporters to prevent telefragging, will attempt to recover Navigation from far distances, will hunt monsters as priority not racing mission.
Version of redeemer practiced here will be used by Bot too and Skaarj, and... I forgot all tunes (too many anyway).
I did not play more MH2 last time and I think it's not a need to keep this MH2 only for myself. MHv5.04 is my current target but I'll be glad to use any 5.05 if anyone will do such things.