I don't understand why anybody who has the base game hasn't bought Horizons.Anything that involves synthesis even including infinite basic, synthesized better probes is not a solution. For non-Horizon players this would effectively turn planetary scans into a pay to win mechanic on the same level as Candy Crush & Co.
"Oh, you want to scan this planet faster, but all you have are the basic probes? Buy the 12$ Addon now to get instant access to the premium probes for 50% faster scanning!"
Is this REALLY what you want to turn ED in to?
If I'd bought a game, was enjoying it and saw an expansion for 10-15 quid in a sale I'd jump right on that!
Yes Horizons should become the base game whe the next paid update lands but are people really so parsimonious as to wait for that to happen?