I have 512 mg too and it takes a lot of loading, more than 5 minutes
. but i think too that is a "slow game" and when i load it i play for a lot of time .
Perhaps the problem could be if the engine could become becomes unstable or canīt manage too many things, and cause very anoying CTDīs or strange behaviours.
(worse with long loading times because you have to wait a lot of time again.)
I think that GWX put SH3 engine to the limits and nobody know how much can withstand , but this is like crush depth, you never know this deep until you are crushed.
One tip for tests and trials except for dinamic campaigns, is use academy missions or modify the convoy attack training mission with mission editor.
it takes very little time to load and is very good for see some things like textures, u boat behaviour, etc etc.
Single missions are the same than campaign in load times.