I know I'm a broken record on this, but if the MBTA could somehow get out of the electrification and trestle "agreements" (requirements would be a better word to describe it), then Phase II would be a lot more likely to happen, hell, it could have been under construction right now if the Army Corps of Engineers actually wanted the project to get done. I mean come on, the Greenbush Line was a similar case to this, brand new tracks being built over an old ROW that goes through some sensitive environmental areas, but nobody forced the MBTA to electrify it or build any excessive infrastructure to "mitigate" the line going through those areas (of course there was unnecessary infrastructure on the line, but they were to pacify NIMBYs, rather than for anything environmental).
Sadly, it seems as though there are no plans for having this happen anytime soon, and that will come at the cost of not having Phase II service at all, I don't know about you, but I would rather have faster Phase II service with Diesel than slow Phase I service being permanent, just because Phase II could be electrified.
About Bourne service, I assume that with Phase I it would run only between Middleborough and Bourne as a shuttle service with Phase I, as the Middleborough Main cannot handle any more traffic due to the single tracking, I fear that this will be unpopular amongst Cape commuters and will end up being unpopular along with Phase I, making both projects practically failures, this just all the more reason to drop the mitigation requirements and just get work started on Phase II, without any unnecessary and costly infrastructure for "mitigations".
Photo by Alan Thomas: NYNH&H I-4 Pacific #1372 proudly thunders through Forest Hills as it makes its way to Providence R.I.