I have some answers for defensemen scoring - done the top 10 for all post-lockout years, and the P% of most years top 10 is in that 22-28 range. There are a few outliers obviously, and using my Average VsX numbers here are the best seasons and the ones who broke 30% in P%.
Name | Year | Points | P% | Avg VsX D |
Nicklas Lidstrom | 05-06 | 80 | 0.266 | 114.18 |
Nicklas Lidstrom | 07-08 | 70 | 0.278 | 111.11 |
Mike Green | 08-09 | 73 | 0.272 | 110.43 |
Mike Green | 09-10 | 76 | 0.243 | 118.51 |
Duncan Keith | 09-10 | 69 | 0.263 | 107.59 |
Lubomir Visnovsky | 10-11 | 68 | 0.289 | 107.46 |
Erik Karlsson | 11-12 | 78 | 0.321 | 126.65 |
Erik Karlsson | 13-14 | 74 | 0.323 | 119.61 |
Erik Karlsson | 14-15 | 66 | 0.284 | 107.17 |
Brent Burns | 15-16 | 75 | 0.335 | 121.22 |
Kris Letang | 15-16 | 67 | 0.309 | 108.29 |
Oliver Ekman-Larsson | 15-16 | 55 | 0.333 | 88.90 |
Brent Burns | 16-17 | 76 | 0.347 | 120.64 |
Victor Hedman | 16-17 | 72 | 0.313 | 114.29 |
Erik Karlsson | 16-17 | 71 | 0.345 | 112.70 |
Brent Burns | 18-19 | 83 | 0.287 | 120.41 |
Mark Giordano | 18-19 | 74 | 0.256 | 107.35 |
John Carlson | 19-20 | 75 | 0.318 | 127.63 |
Roman Josi | 19-20 | 65 | 0.307 | 110.62 |
Roman Josi | 21-22 | 96 | 0.366 | 133.26 |
Cale Makar | 21-22 | 86 | 0.279 | 119.38 |
Victor Hedman | 21-22 | 85 | 0.298 | 117.99 |
Erik Karlsson | 22-23 | 101 | 0.433 | 138.57 |
Josh Morrissey | 22-23 | 76 | 0.309 | 104.27 |
Re: the pairs/lines taking advantage, I actually feel like that's a more prominent aspect of the O6 era. More teams means a more diffuse schedule, with the best players only getting 4-6 games per team against the worst teams. In the O6 era, there might be only 1 or 2 really bad teams, but the best players would have 14 games against them. It's hard to time the dynasty teams, but if you just go by DET MTL in the 11 years between 49-50 and 59-60, after including ties there are 58 slots in the top 5 scorers, and DET MTL take 40 (split 20/20), CHI BOS NYR TOR take 18 (CHI - Litzenberger 56-57 58-59 Hull 59-60, BOS - Ronty 49-50 Schmidt 50-51 Horvath 57-58 59-60, NYR - Raleigh 51-52 Hergesheimer 52-53 Bathgate 55-56 56-57 57-58 58-59 59-60, TOR Bentley 50-51 Kennedy 50-51 Smith 51-52 Sloan 55-56), a 70/30 split. [In fairness, that split for 6 through 10 plus ties has a much better balance, DET MTL has 23, CHI BOS NYR TOR has 34 of the 57 slots. OTOH, before the non-dynasty teams swept the top 3 in 59-60 (Beliveau tied for 3rd), Bentley 3rd in 50-51 and Bathgate 3rd in 57-58 and 58-59 were the only seasons preventing a clean sweep - 27 of 30 or 28 of 34 (split 13 DET 14/15 MTL).]
On the other end, how do you even begin to define dynasty in the modern NHL? The first tack I took was the top 5 teams in points from 05-06 through 15-16, which was Detroit, San Jose, Anaheim, Pittsburgh, and New York, then counting their top 10 appearances. That ended up being 34 of 113 or so, or about 30% when 5 teams represent 16.66%. You could go by Cup success, where you'd have Detroit, Boston, Chicago, Los Angeles, and Pittsburgh and cover every year from 07-08 to 16-17, but only get 23 of the 107 slots in that period. You also have Tampa, where if you declare 18-19 to 21-22 their dynasty, you get a bunch of Stamkos/St. Louis top 5 finishes from 2010-13. [Also, I initially cut off at 15-16 to match your 11 seasons, but if I extend to 16-17, Washington replaces New York, and suddenly you have 15 top 10 finishes replacing of 3 (or 7 top 5 instead of 1 top 5).]
So which is the most unbalanced - 70% of the top 5 with 33% of the teams (or 55% of top 10), your 50% of the top 10 with 20% of the teams (I did a quick count from 75-76 to 85-86 and got 36 of 57 top 5 slots, 63%), or 30% of the top 10 with 16% of the teams that is the modern game. I don't know that you can have one consistent standard that you can apply to each era.