I think that shes a fun and appropriate commander in the context of this precon, even if she isnt doing anything too out of the ordinary
Even if you don't have enough creatures to make this a counterspell, you can always pay more into the X part of the casting cost to make it one
Normally, a player's turn begins with the untap step, then the upkeep, then the draw step before proceeding to the first main phase
There's almost no downside, and putting a card like Ulamog, the Ceaseless Hunger or Karn Liberated underneath Ugin's Labyrinth via imprint only to pick it back up when casting it is easier adds a layer of versatility to the Tron strategy that will make it even more of a threat than it has been previously
She's sort of like a living Ozolith
Yes, this ability does synergize with Sail the Azurite Sea or other effects that allow inking a card. But, it does not work with the effect like Measure Me Again from Tipo Growing Son that allows a player to put a card from your hand into your inkwell. Inking a card is a verb and is specifically different from putting a card into your inkwell