Why can't you work with Jack0919 on improving his version instead of releasing this one?
Seems pointless having two mods which do the same job

i work on trying to improve it to add more stuff, many people say his does not work properly

i only released this today, due to my forum being slow and using his mod, but found it useless

so i started to change some of the code to suite the whole forum

Would be the best thing to do

How do either of these mods affect server load?

It sounds like you're making apache do more work and increasing the load, so that the page appears to load faster?

If we're already at our server capacity, will this actually make things worse?

That cookie situation is affecting all my other sites. If you logout then log back in, you must refresh the page for it to accept the cookie ....

htaccess can affect server load, but until i see it happen i will report this a bug to fix
i am currntly working on

Cookie Control
and kuch more

i've just removed it myself, and will report this a a bug

jst remove this
RewriteCond %{HTTP_COOKIE} !(^|(.+;)*)Usercheck=validated(;.*|$)
RewriteCond %{HTTP_COOKIE} !^.*cookies=true.*$

Taking somebody else modification and cleaning it up without their permissions is against the rules. You must have permission to re release a modification even if you have cleaned it up. The original code that you started working with was not your own. The best solution would be to work with the original author and not steal his work. Its just not good ethics.

people have reported bugs to your version

i am adapting it to work with all mods including VBSeo