I think it would be a cool idea if the text on the Nixie tubes could be changed by dispensing a name tag onto them.

This could be used to simply toggle a text using two dispensers pointing into a line of nixie tubes, or you could have nine different name tags in a single dispenser and a random one would be chosen for every press.

Functionality-wise it would act like dispensers currently shear sheep, i.e. it would use the name-tag from the dispenser but the tag itself is not launched out or /used up/ (like clicking a name tag onto an entity).

This can already be done with deployers or by right clicking and it does not consume the name tag either.

That is too true. I'm still too much of a vanilla scrub. Thanks