Sam Gyimah is okay, but in relative terms, the post isn't especially powerful, so I don't know that he has a great deal of influence unfortunately. Indeed, you could well argue that the constituents of the leave vote aren't really that interested in scientists either, so I'm not sure that the Crick survey will be given any attention by May whatsoever.
Re your second point, it's perhaps worth remembering that a big part of Nurse's beef is that the government are creating/have created an unwelcome environment for EU scientists and researchers. This is essentially a talent business, and there is considerable movement of researchers both into the UK from the EU and vice versa. Collaboration among European universities is very high, and so barriers to that collaboration are not supportive at all. Migration has been a huge driver of this (if not the main driver) and with all talk being of massively reducing immigration, it's making a horrible environment for people here who just want to live their lives (and I know this from personal experience).
There are also a lot of EU-wide projects, whether around basic research (which would require the UK paying into the budget) or common standards (around data sharing etc.), which would require the UK being a rule taker rather than rule maker. Both of those things were strongly rejected by leave voters, so when coupled with the migration issue, it's hard to see how any leave voter can really support being part of EU science and research projects.