Like I said its entirely possible he could be made available, but I don't see a reasonable trade right now that makes sense, especially with expansion looming. If anything I could see a deal this summer if he were to be dealt, but it would require Draisaitl to prove himself as a #2C who can take the hard defensive matchups, and Caggiula proving he can slide into the 3C as a permanent fixture. Both of those things are more than possible.
Now as for Nuge's production, maybe he does and maybe he doesn't have that offensive potential anymore to be a 60 or 70 point guy. I think its hard for most players to put up that kind of production from the 2nd/3rd line, especially with the way Edmonton is running 3 scoring lines so the winger pool is a little diluted for Nuge and Draisaitl (although RNH has been with Eberle and Maroon for the last 3 or 4 games and they've been creating a ton since then). The other thing is Nuge has been bumped down to 2nd PP so his production is going to suffer even more from that. Maybe they'd be better off running Draisaitl on wing with Nuge, but they seem to like the 3 line attack to create mismatches.
I don't have an issue with the way TMc is utilizing RNH. He is by far our best defensive forward at this point in his career, and is noticeably stronger this year. He wins the majority of puck battles he's involved in simply because his stick work is very good and he is not as easy to knock off the puck as he once was. He's tracking to be a poor-man's Bergeron, and imo won't be at his peak for another couple years as he finishes adding weight and strength. I think the role he's been given helps the Oilers win more hockey games than they would if he was trying to get RNH to just run and gun to pad his point totals. He doesn't need to do that when we have a 1st line centre that is probably going to score 90-100 points this season.
We'll see how the rest of the season goes, but if he manages to score 50 points with his very good defensive play and limited offensive opportunities then I will be ecstatic. He's been snake bitten and has had poor performance out of his line mates up until recently, but imo he is more than capable and will break through eventually this year.