I own a bdp105-d and used to use it as a player but the sound reproduction of the unit wore me out- to bright/edgy and led to listening fatigue.
My experience with the 203 was the same (as you’ve mentioned) and as Oppo stayed with the same chipsets I wouldn’t have any faith in the 205 sounding much better.
I’m not sure if you’ll have success with streaming Tidal either as the app is no longer updated/supported by Oppo. Maybe someone else can chime in as to the status of Tidal on the Oppo.
Have you considered purchasing an all in one player/streamer/dac unit. There have been many threads/posts regarding those products. Oppo’s are still popular with the AV crowd- I would imagine you could trade your 203 and T2 towards a newer product that’s more in line with your present goals.