Trinity is $40 right now. So new customers are getting Trinity (which is part of Rebellion, it's standalone, right?) plus the new Rebellion features for $40, so the new rebellion features are essentially costing them NOTHING.
While Rebellion may be using the Diplomacy game engine and reusing/extending the existing assets, I don't think it's fair to say it will just be Trinity plus Rebellion features yet... I'm hoping this game will diverge from the original in strategies and potentially some areas of gameplay.
Here are my reasons why this may warrant the 30 dollar price tag for existing users.
First, I don't think they realized what they had with Entrenchment. It could have easily sold for $20 dollars. The fact that it was a $10 dollar expansion was amazing. Diplomacy on the other hand fit a $10 dollar micro expansion IMO. Even with the combined $20 dollars for the expansions you are only spending $10 more for this expansion which if I'm right will add more content and strategies than the previous two combined.
Here are my reasons why this expansion "will" be worth the cost.
New Factions: Players decide whether to become Loyalists or Rebels, which unlocks a unique new tech tree granting them new technologies and ship variants.
To me this means this is not simply Rebellion built on Trinity. New factions, unique new tech tree, new techs and ships is quite a change from what the original expansions offered.
New Titan-class ships: Massive warships for each race that dwarf capital ships, these deadly new monsters are capable of wiping out entire enemy fleets single-handedly.
To me this could have the same impact Entrenchment had. I'm not sure if Titans will be just beefed up capital ships or capital/starbase hybrids (i.e. level up and able to purchase specific upgrades). Either way I'm excited about this change both for the game and modding.
New Capital Ships: A new capital ship class arrives, giving players new strategic options.
I'm excited to see what this will be.
New Corvette-class ships: Small, highly maneuverable light ships that are adept at a variety of tasks.
Might be the answer to LRF in online play. Not sure how this impacts the game yet, but it's the first combat frigate added to the game. (Entrenchment added starbase constructors and anti-module, and Diplomacy added Envoy's).
Loyalist and Rebel versions of some of the existing Sins’ frigates and cruisers, each with their own unique strengths and weaknesses.
To me this is cool... It means sub-factions have traits. I asked something similar when the ideas for new expansions thread were going. This is way more than just bringing over the existing Trinity races imo.
Updated lighting and particle effects for enhanced visuals.
New eye candy is good. This will probably be even better for modders.
New Victory Conditions to allow for more variety, differing strategies and shorter game sessions.
The current victory coditions are meh. Depending on how they do this it might be possible to create map scenarios that take advantage of the new Victory conditions.
Additional capital ship ability levels, for greater strategic choice.
Ok, this is really significant. Currently all level 10 capital ships of the same type look exactly the same. I like choices and just like starbases the choice has a signficant opportunity cost associated with it. Say for the Kol, if I want to build a cap killer maybe I give up on some of the anti-strikecraft abilities. This one is gold for modders too.
Impulse::Reactor support for chat, friends, achievements and more.
ICO needs retired. Nothing personal here, but Sins needs a better online mechanism including stat tracking, etc.
It's true, Stardock/Ironclad is a business, they can't just give things away. Maybe this is the only cost model that makes sense for them to make some money, therefore it's the only way for us to get the expansion. But I ain't buyin' that theory yet, and I am a customer free to go buy something else until I am sure I am getting my money's worth.
By all means don't buy if your not comfortable. I got in on the Elemental pre-order and wish I had waited. Now that said, I'm still looking forward to E:FE to see if that ship corrects itself. However, in this case we are working from a proven product to a new full expansion where they aren't restricted to the original game which is why we never saw significant changes to the races, research, ships etc with the previous micro-expansions.