This is something we talk about a lot internally. The interface wasn't designed around this in this case. For every person who says 'man it'd be great to see what value I'm at' we have somebody else saying 'I'm SO glad I don't have to use my eyes!' It's all context dependent and surprisingly hard design problems to implement well. I'll keep thinking about options
"+1 Yeah, it would be great to see the OLED screen used for more value/parameter feedback.
After being acclimated to all the other Sequential instruments with these screens, I had just assumed the T5 would have the same sort of UI functionality"
I am in full agreement here. When trying to learn how a preset does what it does, I like to see the parameter values in the screen, like almost every other Dave Smith synth. With all the mode buttons, there should be a way to compare in real time your changes to the original parameter. The Mopho X4 does that, and this is really a replacement for the Mopho X4.
Those who say they don't want to see values can always just ignore the values... to me, that's a red herring argument / non issue... If you're intent on "ears only", that's fine -- having values on the screen does not prevent that at all. I constantly switch back and forth between "ears only" and "ears and eyes together".
There's a lot of value in having visual feedback as well. Having numeric values allows for more precision and technical sound design tricks. Also, its valuable when you return to a patch in a new session and want to edit it further, to be able to have some indication/comparison of where you were before on knobs.
This is a case where
more is more. You don't have to use visual cues if you don't want, but having them available further improves capabilities, and speeds up sound design... which results in
more fun, and less tweaking.
I understand and appreciate that the implementation may not be trivial. There definitely are enough pixels in the OLED though. Even if values are small (7px text), or just appear as temp popups, they would be nice to have. And an asterisk or other marker, like @Autosynther mentioned.