Re extra charges and single trial. I don't know (and don't care lots) about how all that would boil down, but I think that indictable and summary offences have completely different guidelines - all the way from whether or not a jury is sworn in to what basically amounts to very little more than a roadside ticket and a "He said. He said" contest which might, or might not, be settled when Marty the bike owner's insurance company hit the witness stand. I don't suppose you can try somebody for an indictable offense with summary offense evidence, "totality of the evidence" notwithstanding.
In any event, it's worth remembering that the threshold required for police to lay charges falls very, very far short of the "beyond a reasonable doubt" threshold to find a verdict of guilty. That's in no way to suggest that police investigation is anything less than capable. Only to remind oneself that those findings are uncontested. IMO this is especially important when a case apparently significantly relies on circumstantial evidence . (This may not be true, of course. Time will tell.)
In any event, it's worth remembering that the threshold required for police to lay charges falls very, very far short of the "beyond a reasonable doubt" threshold to find a verdict of guilty. That's in no way to suggest that police investigation is anything less than capable. Only to remind oneself that those findings are uncontested. IMO this is especially important when a case apparently significantly relies on circumstantial evidence . (This may not be true, of course. Time will tell.)