I know - very bad news. The hotkeys ctrl-space and ctrl-shift-space
still work, it's only the automatic appearance of those tips while
typing that stops.
If it comes right down to it I think there's a fairly small number of
triggers you'd need to cover - dot and open parens when they follow a
valid identifier - so I think those commands could be fired explicitly
by the spark language service if the contained language service isn't
picking up the cue.