When the expansion pack was in existence, the way the expansion pack was viewed was that it was covering two major expansions walking around and planet landing. Now it looks like there will be a number of addons of varying sizes and presumably cost with these two expansions broken down into component pieces. I also get the impression FD have committed internally to a number of expansions and probably have a number of others they want to do. I sincerely doubt the expansions pack will come back. The issue with the expansions pack is the revenue recognition - accountancy rules, you can only recognise revenue if its actual revenue, the expansions pack has no end point so you cannot say you have delivered it as its a pre-order with no defined end delievery point. FD will going forward want to recognise the revenue expansion by expansion. This is currently why FD's profits look grisly and why they need to release the game so they can recognise the revenue.
Hate to say this, but, that may be the way you viewed it, I didn't, I viewed it as All future expansions, regardless of what they will be, from now until ED goes the way of the dinosaurs. I didn't consider walking around or landing on planets, because that's not what I view ED as. I do see expansions in future things such as discoveries for explorers, non-human races, derelict ships, a long lost human civilization made up of people who left Earth hundreds of years earlier in cryostatis, or any number of other possibilities.
If walking around and landing on planets end up as an expansion, well, I'll get it, because I did take the risk and purchased the lifetime expansions when they were available, so I don't have to concern myself with future expansion purchases. I could also have been a fool, perhaps future expansions will end up being free, oh well, I made my choice too. But we won't know until it happens, I was prepared.