So scanning in ME2 was tedious and boring, but was it so different from ME1? At least in ME2 there was a significant motivation for gathering materials. What do you think will be the new system for gathering resources in ME3?
The systems of me1 and 2 are not comparable. You weren't hunting down resources for research, but for credits you didnt need.
However they made up for it by including missions that didn't involve quests devoid of soul. (or voices, me2 n7 missions served to prove they blew their VA budget.)