We're looking at the possibility of releasing an "SWMH-Lite" that is the very latest SWMH with simply India & West Africa & the Sahara region deactivated, for performance reasons.
I already have it working (and an automated process to create it from the latest SWMH), and it's all I use for my personal play now, as it's completely lag-free (faster than the 2.3 version + over a year of fixes & improvements to the general map/history besides those excluded, isolated areas + works on 2.4/HL + will always stay up-to-date with the latest HIP).
If you're having performance slowdowns with the new SWMH and availability of such a performance sub-mod is something that would make your day, please do let us know. As I enjoy playing on my personal performance mod, it only seems increasingly more important to make such a thing available to would-be SWMH users. It's absolutely painful for me to see HIP users relegated to 2.3, never to see another HIP update let alone the new map just because they don't have the option of simply turning-off those isolated parts of the map (or doing so when it suits their particular game), especially when I have the solution in my hands.
[ If this were made available publicly, it would still require additional work for me to add polish to the sub-mod generator program that I wrote to deactivate parts of the map for me such that it requires no human intervention to always be up-to-date with the latest SWMH changes. So there's still work to be done, if this thing interests enough folks. ]