Dealing with chain skipping (but mostly on the smaller chainrings, truth be told) I've wondered how these affect the riding and how many problems and what kind should i expect from these two broken teeth on the big plate, and close together as well:
The only issues will be directly observed, i.e. either it will mis-shift, over-shift/drop the chain, or not. These don't look like proper ramp teeth which do resemble broken ones, except they're usually spaced 2 or 4 evenly around the ring. The wear looks advanced enough that you really have no excuse not to just get another new or less worn ring and avoid problems.