Sorry but this seems like are redundant question really.
ME2 is coming to PS3 late because of circumstances outside EA control - it's job now isn't to sell hugely but to pave the way for ME3 and the franchise in general on the platform. EA no doubt hope it will sell okay but probably know that the price will soon drop and the bulk of sales will be at a lower price point.
General business practice is asituation like this is to release full price. The fact the game is cheap on PC or 360 is irrelivent, you can't stick those versions in a PS3. From a PS3 only perspective they might as well not exist. EA and other publishers know this - that's why such releases are all full price. They also know that after an initial peak of inteest the price will probably drop fast, but they'll accept that as standard for such a release.
Would I release full price? No, I'd release at a lower (but still way higher than current PC/360 prices) level. But... the funny thing is you've got to understand general pricing principles. In classic pricing theory ME2 is brand new on PS3 and to release at a lower price would devalue the title next to it's release price on 360/PC. Now, like I say I'd take the later nature of the release more into account than EA are, but such titles are always going to release above current low pricing on other platforms.
In the end, like I say, the value of ME2 on other platforms is strictly speaking irrelivent because that price is directly relative to that platform. ME2 on PS3 pricing is directly related to PS3, where the title is brand new and has never been on sale before.
A slightly similar annalogy would be films with staggered release dates - when a film releases in one country maybe 12 months after it's release in say the US does it release at a much lower ticket price? No, it releases at normal full price ticket. Because in that country it's new even as its an old release elsewhere.
To be fair to EA, if they hadn't bought Bioware I doubt ME would ever be hitting PS3, so I don't think we should be too hard on them.
If paying full price bothers you hold on, it'll soon drop.
Try to be reasonable... its easier than you think...
