LSP and treesitter are cool and we might use them when adding more languages eventually. From my understanding though treesitter does parsing only and it would take a bunch of work to do the semantic analysis clang already does. Plus clang is an industry tried compiler that we know can handle a lot of the rough edge cases of C and C++. LSP is closer to our use case but I think still not close enough. It took a lot of work to get the right points to cut the code at and when talking to clang directly, at least we can inspect things at a decently low level.
Are you on X? You can DM me at @pst723 or @territory_dev.
Do you have a way to contact you?
Any reason you're not using treesitter with LSPs by the way? This would make it really easy to get this working with all major languages at once.