I think tactical voting is going to be the key to resolving this crisis; otherwise, a small Convervative majority is likely (even with the Brexit party splitting the Brexit vote, it's still only a two-way split), as opposed to a 3 or some cases 4-way split amongst Remain voters.
I was talking to my Dad about it last night. He has pretty much always voted Conservative and also voted for Brexit; he told me he will vote for Lib Dem because he has huge regrets and wants Article 50 revoked. Lib Dems are the only viable challenge to Nadine Dorrie's safe seat where he lives. I believe there are many other 'Regrexiteers' who could have a huge say in this election - IF they vote tactically.
Personally I don't agree with this election at all. Elections should be about broader issues, not single issues; this election is soley about Brexit and that feels wrong. But we're kind of in this situation because the Remain movement is, on a governance and autority level at least, an absolute shambles (the people-led movement is fantastic and suspiciously played down in the media). The Remain camapign during the refrendum was, frankly, shit, and now the parties are still squabling amongst themselves. If they just got their shit togtehr and collaborated I think we could get ourselves out of this mess through a second refrendum and without the need for another GE.