Meddler, Lets talk about being a Tank and Giving Shyvana a proper Utility
*Meddler these were your words " Tanks go straight into a fight, have natural survivability, sustained damage patterns, team utility/CC and are usually not attractive targets to try and take down if you've got any better options. "
"A tank that's able to remove a target from the fight for a period of time, without killing them or setting them up to be killed (so not a pick tank like Nautilus or Skarner) is something I'd agree's got potential as a concept (and is one of the options we've talked about exploring for a future tank at some point). Would be hesitant about putting that sort of effect on a kit with high mobility though - sort of thing that decides fights so can't be too accessible/reliable. "*
Shyvana DOES NOT have utility/CC. Her ult shouldn't even be considered as "CC" because it just pushes the enemy lightly, not only that, her ult flight can easily be canceled these days. I have yet to hear a Dragon kit idea that you would give for Shyvana but I'm sure it's not a priority at this point since other champions are in need of reworks but would like for you guys to focus on her Dragon form kit for a change, I'm highly disappointed that Mega Gnar is more fearsome than Shyvana turning into a dragon who isn't as fearsome as Mega Gnar due to the fact that you came up for him an insane amount of Utility/CC.
But moving on from the dragon kit, I would like to suggest you to give Shyvana a Utility similar to Udyrs FOR NOW till you guys come up with a dragon kit (As you can see, Udyr has an INSANE amount of mobility with a stun) Why? because lately all these champions that you guys have made are capable to push shyvana away with a simple reduce movement speed or a tiny CC. In other words, Shyvana CAN'T catch up unlike udyr. You're making all these new champions have a special utility/mobility to a point where shyvana can't fully support her team since its common knowledge that the enemy ignores tanks and aims for the weakest link in the team (Mages/Assassins/ADC) which is tough to protect them cuz again the kind of CC/Utility you gave to these new champions that Shyvana can't catch up but not only the new ones, even the old ones have their own utility/CC like Udyr.
Lets Review Udyr's stun skill " STANCE ACTIVATION: For a short duration, Udyr gains increased movement speed, ignores unit collision, and performs a short dash towards enemy champions he stuns with his attacks. PERSISTENT EFFECT: Udyr's basic attacks Stun icon stun the target for 1 second. This effect cannot occur on the same target more than once every few seconds. "
My suggestion was to give Shyvana's Q a stun with the added persistent effect so people won't complain about the reduce cooldown and attack speed advantage. Then when Shyvana turns into a dragon, her Q will stun not only one target but anyone who's in front of her. I feel like her Q has that potential to do a specific utility role, when she activates her Q it can notify the enemy that she's ready to stun or attack, with this it will be more useful in laning, Team fights AND ganking as a jungler.
Also it's common knowledge in rank for people to ignore Shyvana in team fights if shes being played as a tank, not only that people understand that it's best to walk around shyvana since her W is another common sense to move away from. It's like saying Shyvana is not fearsome or a threat to the enemy anymore but more of a giant rock being in the way of things who isn't doing much but poking people's backs.