Also, on the overall topic of lineups and rotations, I dug up some numbers from nba.com.
For the season, we had 593 lineup combinations. Milwaukee had 601 for example and it didn't seem to hurt them (didn't seem to hurt us all that much in fact, since we have the 2nd best record). Indiana is very stable at only 301 lineups, Boston had 450 and Philly had 641. Indiana had outstanding health this season (in terms of players missing games - obviously the one injury they had is by far the most important), so that allowed them to maintain a consistent rotation throughout (and they made few trades). Philly, Milwaukee and Toronto had a lot of player turnover due to injury and trades, so they had the most combinations played.
By month of the year, we had
165 lineups in November
219 in December
175 in January
140 in February (far fewer games this month).
Take Boston for example
not all that different. I looked at a bunch of teams and while we tend to be higher on average, it's not by a huge amount.
Interestingly enough, when you remove the trivial lineups, it turns the tables somewhat. If you only take lineups with at least 10 minutes played, you get this (for the season)
Boston - 71 lineups
Toronto - 57
Milwaukee - 57
Philly - 72
Indiana - 49
If you restrict it even more, say 50 minutes played
Boston - 8 lineups
Toronto - 5
Milwaukee - 2 (!)
Philly - 9
Indiana - 9
Or, if you expand it to 5 minutes or more
Boston - 126 lineups
Toronto - 120
Milwaukee - 131
Philly - 143
Indiana - 81
So, by and large, the number of lineups utilized throughout the season were in line with the competition. We tend to use more very short lived lineups (less than 5 minutes played total), but not significantly so.
I tried really hard to find any stat that would show us as being out of line in terms of lineups, but I couldn't find any.
Personally, I don't see much evidence that Nurse has tinkered excessively with the rotation this season.