I have nothing against Tsukuba by itself.
But due to the context that GTS finds, Tsukuba is not a convenient and timely circuit, now. IMO.
GTS is a game focused on the online mode. The Sport Mode is essentially played by groups Gr. 3, Gr.4 and, finally, Gr. 1. This is the essence of the GTS game. And Tsukuba does not match with this essence, in the first moment.
In Sport Mode, the main groups (Gr.3 and Gr. 4) have been running SIX MONTHS running on the limited list of ten circuits, especially Suzuka, Interlagos, Dragon Trail, Nurburgring and Maggiore. This is the main cast of GTS circuits, according to the choices of the Sport Mode.
And many players are a little bored for always competing on these circuits daily.
I understand when they say the circuit is free. But that does not detract from the right of us, consumers, to question the choices. After all, although free, we paid a few dollars not only for the game itself, but for the game's own SERVICE. The game was sold as a game-service, which would be updated monthly. And we bought the service and the idea too!
So it's not "free", simply.
I think it is important to emit opinions, be positive, be negative. And I think it's also important for PD to listen to the FEEDBACK and the WISHES of the community, especially the desired circuits.
I think you can not live by just saying "amen" to everything that PD does. Feedback is very important. Listening to the community is critical to the success of the game. After all, PD creates the game for us, not for a specific group of people.
And of course, GTPLanet is the best place on Planet Earth where PD can discover the desires and feedbacks of the game users. So, issuing opinions on Gtplanet is very important. And PD knows that here is the best place.