Considering my current future game rig planning and obsession with the first three games... yes, and the Collector's Edition. I would be more upset if they either decided that whatever new series was going to have alternating protagonists between games (part of Mass Effect's charm is the multi-game main character who you shape) for a fifth game, or they forced certain Mass Effect 3 points as your canon (if applicable).
I'd love to import for history codex entries at least- but with a face import code to use for at least any small shout outs and after watching my brother struggle with the Keep (he played through the first two games recently for his perfect world state and he is massively ticked at Inquisition right now) but got his story choices done, it would do at least between Mass Effect 3 and a new trilogy. Mass Effect's main character through games is really unique and I think that for a new trilogy, Bioware would absolutely kill the series if they forced people to switch every game and do the Keep/type thing without imports inside of a trilogy.
I think half the reason Mass Effect fans find the DLC so vital is because it served a purpose and by the third game, gave us more time with our main character/Shepard and we wanted that because we are so attached.
Mass Effect 4 is a pre-order as is a near mythical Fallout 4. I just hope they get past the whole survival/horde mode like in Mass Effect 3's multiplayer. Mass Effect is so layered and offers so many things you can do co-operatively, it seems a waste otherwise. But, I'm fairly selective game wise so it's not a big spend.