I've been on Love is QB2 in the draft since like... November or something. (after Tua's injury).
About your question... I'm of the mind that IF Love/Herbert/whoever we draft is ready to play by week 1 he should play. This should be the goal no.1 for this coaching staff if we draft a QB high - making him ready to play day 1. This doesn't mean I expect them to be great and it doesn't mean I don't expect them to have rookie mistakes, but if the guy can manage the offense and run it without major hiccups I want him in ASAP.
I think Herbert is probably going to be more likely to be ready sooner, but I'm not completely closing the door to Love being ready. Keep in mind that Reich was part of the coaching staff that made another small school prospect in Wentz ready to play from day 1 and forced their highly paid ex-starter to ask for a trade.