Id much rather have Liara and Ashley/Kaidan than any of the garbage I got saddled with in ME2 (okay Samara and Mordin were good, but the rest were just singularly crap).
The truth is, ME2 fans were made aware of their precarious state long ago, before ME2 was even released.
Here is what Casey Hudson said on the absent ME1 squadmates from ME2 (Liara, Ashley, Kaidan):
"We actually want to make sure these characters survive the ME2 story, which ultimately is a suicide mission: some of your crew will almost certainly die. Some of the ME1 characters are back, and recruitable (more than you might think), and the ones that aren't still play an important role in the story and will be around for ME3 - which we can't say for the new characters."
In short, if you dont like that these ME1 characters who missed out on ME2 are now all but certain to return as key squadmates, tough shit.
Its what you get for expecting those expendable characters in ME2 to be automatically in your squad for ME3.