I donĀ“t like the idea to remove the "summon sickness".
Summon sickness is there, so that the opponent can react to the creature.
If you want to make that impossible as a player , you normally need a color, which is different from the color of the creature (except Phase Spider).
The other effect could be OP for creatures with high quanta costs.
I could imagine, that the quanta costs for creatures are halfed (rounded down), that means that the Firefly Queen needs 1 quantum, so that the card is in many cases not better than a mark card. ( You could take a pillar in stead of the shard ), but a bit better on nymphs and some other rares.
So suggestion: SoR:
The skill costs of target creature are halfed
Some special effects I could think of:
1. If you use PU, the second creature has the same skill costs.
2. Halfed costs stay, if you mutate or hatch.