I'd rather see the starbase phase jump moved to a starbase upgrade (that uses say, 3-4 upgrade points) instead of a global research.
It would be foolish to remove such an interesting element of the game, it just needs better balancing.
If it was made an upgrade, when you build a oky it doesn't automaticaly get the phase jump ability, you have to buy it (per starbase you want to jump) and in doing so you have to sacrifice other upgrades you might have bought.
I belive this would make it much less overpowered.