Which "intended one" was ruined by mode switching. I've never done it, but I know people do. I do think that like the BGS, missions and such spanned the game not just the mode.
Check out Fdev statements - they do reflect my point of view. Then they added different game modes to cater those people who find PvP interactions too much of an expirience. And forgot that most people are more goal-oriented than the others, and did not counterbalance for their potential game expirience losses. Like they do with money exploits.