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@Kerizi obviously fewer entities (especially vegetation) means more performance but I wouldn't call that "more optimized". Instead, let's refer to "more optimized" if for the same HD entities one come up with further improvements which result in better performance and more stability. So for instance, by providing LOD, SLOD1 to SLOD4 models, calculating reasonable LOD drawing distances, generating static collision models, clustering entities to get proper ymap sizes, ...
By that definition the Ultimate edition is as optimized as the free edition.
If you are curious you may want to compare the old (non-optimized) version 2.0b of GTA V Remastered with version 5.1
You will notice that even though v2.0b offers less entities (~7000) the game crashes once in a while and it is much less performant than v5.1 (~14000 entities).

@ChrisPratt please contact me on patreon or discord (larcius_gaming)

@DankishPenguin this mod adds new entities to the game. it has no effect on things such police spawning. please check what other mods you use that might cause such an issue.

@LL125810 please have a look at the troubleshooting.txt in the *-SP.zip file. There is a dedicated section for exactly that topic (gameconfig.xml adjustment if you use other heavy mods).

@Michael21107 yes, you're right. I will update the script and it will be part of the next release.

@Shark_boy_Anil you can only edit and delete entities that are not linked to a LOD model (i.e. <lodLevel>LODTYPES_DEPTH_ORPHANHD</lodLevel>) and that aren't part of static collision models (i.e. <flags value="X"/> with flag 4 "disable embedded collisions" is set in X). Otherwise you need to adapt the LOD parenting chain, the LOD/SLOD models and static collision models, which is quite nasty to do by hand.
However, you can delete whole areas since these areas are independent from each other. To do so remove every ymap and ybn file with that area prefix. So for prefix forests_n_e delete all files forests_n_e_*.ymap, forests_n_e_*.ybn, hi@forests_n_e_*.ybn

@TheSchoschiTV yes, i'm already working on that and it will be part of the next release coming at the beginning of march.

@IDedSecI i cannot confirm that there is such an issue. I assume you are using other mods as well. If so please have a look at section "Common issues" in troubleshooting.txt part of 5.1-SP zip archive

@F7YO yes, it is

@auchd yes, i'm already working on it.