I would give Riker, and for that matter Ro, a pass on the events in "Conundrum" as they were, quite literally, not themselves. And I think it's time to end all the "who cleans the holodeck" jokes as there is transporter tech there, hence the solid objects, so anything "left behind" is just dematerialized.
Except, they were "themselves", just without the memories of events/specifics. Of course the idea that you could forget what happened to you and still be the same person doesn't track... then again their memories were "suppressed," not gone, and we can see they were still subconsciously influenced by those emotions (Riker/Troi). The fact that everyone's personalities etc were still the same was why they didn't complete MacDuff's "mission."