The focus on 360 is how you end-up with things like the SSE revelation and the lack of support for large pools of memory. Non-360 platforms are an afterthought at Bethesda and it shows.
Releasing the full toolkit used to create the game, polishing it off, creating a fully fledged wiki and integrating it with Steam Workshop is an afterthought? Utilising an engine that is developed around being modular and supporting user plugins? Integrating the SSE tweaks into an update after admitting their mistake, and allowing an LAA update to give up to 4GB of RAM support (which solve both of the problems you mentioned btw)? Continuing to update the CK, pushing new development features (such as hot loading)? Releasing a free HD texture pack to the PC only? Allowing INI edits and supporting higher graphical settings than the console versions? Keeping the development console in to allow users and mod makers to debug? Releasing the source files for the scripts for the DLCs? And so on.
There are many, many more things that Bethesda do. Is Skyrim's primary audience the console market? Of course it is, and that perhaps did stop DX11 support and such and lead to a controller orientated UI. But Bethesda are one of the best companies for supporting and encouraging user modification on the PC. If they didn't care, and the PC was an afterthought, we'd have a Dark Souls style port, where changing the resolution isn't even possible from within the game UI. The PC version of Skyrim is considered to be the best of the three platforms, it's far, far from an afterthought.