So let's assume you've accepted that Spotify are never going to restore support for ASD, and you're going to have to start using local copies of the songs you want to work on instead of trying to stream them.
I really like Transcribe - it's got everything I need (looping, speed change, EQ, transposition, section marking, spectrum analyser). It's absolutely possible to do all of this in any DAW (e.g. Reaper, ยฃ0), but I find that a dedicated app makes for a simpler/faster workflow. For me, the price was affordable, and it's a one-time payment rather than an exploitative monthly subscription.