I think I'd just wait and see - keep patching and when you find yourself reaching for something that isn't there... or think of a patch and you are missing something - a sequential switch for example - then look for that - or just spend some time on modulargrid looking through different functions - maybe set the manufacturer to doepfer and read the descriptions and imagine how you would use this module - if you can see it fitting in with the modules you already have then - if something interests you look for similar modules by other manufacturers - watch videos - work out if the potentially more expensive one is that much better than the doepfer - maybe with doepfer you need 2 modules to do what the other module does, but that makes it much more versatile
I'd also spend some time working through manufacturers (this is what I did) - order the modules by price and read the description if anything looks good... then hit you tube
Nowadays I generally just know what I need - vaguely look at new modules as they are released and go - meh...
"some of the best base-level info to remember can be found in Jim's sigfile" @Lugia
Utility modules are the dull polish that makes the shiny modules actually shine!!!
sound sources < sound modifiers < modulation sources < utilities