Can you foresee any balance issue with a Stars Druid using the Cleric spell list instead of the Druid’s?

Homebrewed campaign where tinkering with class mechanics is encouraged to suit your character, I just want to make sure it isn’t horribly unbalanced.

I have an idea for a divination/stars/universe/fate obsessed character, lumbering, slow, strong, wise, warm. Heavy armour melee/mid-field support. However, I don’t really like the Twilight Domain’s Channel Divinity.

The Stars Druid subclass abilities seem like a good match but the spell list leans towards the terrestrial/battlefield control/summoning rather than astral/divination and I don’t see this character ever using wildshape.

Ideas:

  • make a Stars Druid that uses the Cleric spell list and loses wildshape etc

  • make a Twilight Cleric and swap the Channel Divinity (twice per rest resource for most of the game) for one of the Stars Druids abilities?

  • your idea?

Any input and ideas welcome. When homebrew is encouraged I like to troubleshoot for balance.