Frankly, the only people I can see getting mad at this would be the ones who don't realize that this is a collectors edition (Galactic Edition) pre-order and the Alpha is just one (minor) feature of that edition.
I.e. people who refuse to read or understand what is plainly written all over the Steam Store page as well as the Uberent website.
If they had actually charged less on Steam and those people would have gotten it, they would probably right now be flaming that "the game sucks/TA/Supcom were better...." ... simply because of the audacity of releasing an "Alpha" that isn't feature complete and perfectly polished.

And for that reason I also disagree that this isn't an issue of entitlement mentality. It is. There are enough people on the Internet who will raise a s***storm for no other reason than an Alpha or Beta release not being exactly like the full game except for "cheap".
I believe the PA guys choose wisely to not give a **** about those people and to instead use the same price-point they used for their early kickstarter backers... i.e. their actual fans and supporters.
In the end... all publicity is good publicity... especially if any negativity attached reveals itself as nothing else but stupidity for anyone who cares to read up on the issue.

P.S.: If you want to name an ingame planet and have your name show up in the credits (for further supporting the making of the game) you can also get the 200$ Cosmic edition.

If they had put that on Steam heads would probably have exploded.

P.P.S.: For people in Europe the Galactic Edition is actually 83 € on Steam.... but buying it for 90$ on the Uberent webpage- I only ended up with a 67 € charge on my card. - and they will even convert keys to Steam later on as well. So if anyone wants to get this: Get it on the webpage.