For me, it's not a case of 'oh well, it could have been worse', as some are saying. It's the principle of the thing. They've created the art assets and programmed them into the game and then locked off those summons, months ahead of the game's release and are demanding more money from their customers, should they want to have the full experience.
I remember when it was a big deal for companies to lock off content ahead of a game's release. I remember the controversy. However, it's became so standardised now, that people are saying 'oh well, it could have been worse'. It's that very attitude which leads to things becoming worse. What was once a controversy becomes the standard, so the companies will push the envelope further and that will then become a controversy. The cycle continues anew.
Eventually, somewhere down the line, you realise that we've gotten to a point where your initial purchase only covers the game engine itself and it's £5 for a single level and £2 for each additional character. Then you add the amount up in your head for how much the whole experience would cost and it ends up being something crazy like £250. What was once an entire experience for £50, has now increased to £250. That's a vision for where we're heading, which is why it's so important to nip this kind of thing in the bud by voting with our wallets now, whilst we still can. That's why it's so important that we don't just say 'oh well, it could have been worse'.