If a player is at a club he doesnt want to be at, or a club that is not in semi-final contention, he might tank in the second half of the season, reduce his value so he can get the move he wants. Also players with long term injuries are a difficult one for points evaluation. Im not against points in theory, but just haven't really thought about it before.
If a player tanks, well I am sure his club will be over it and it is assessed on the whole year and who will want him, harming his own image thats all
Injuries not that hard, you might lose 1 ranking thats all, reputation will come into it
e.g if you were to rank the fullbacks on this year and reputation would it be something like in order Top few
Tedesco & Ponga (auto 5 played origin) cross them out
So based on the remaining 14 fullbacks Top 10% = 1.4 round to 1 player = 5 ranking
Latrell = 5
Turbo (played 10? games) = 4
Paps = 4
Something similar
Not sure I the idea of players becoming so transitory on a yearly basis; they would definitely hate it. Might decentivize what a club like penrith has done with junior development. They developed a large portion of their team, and even with discounts, they could lose half of them under the points cap at a far quicker rate than with monetary contracts (i.e. they will still lose some of them with salary cap but it will be a slower process so they have a greater opportunity to reap success). I understand there are definitely benefits of a points cap, but think there are some not so nice things that might emerge.
I have said before you can maybe take 2 ranks of home grown would help significantly someone like Penrith,
so Cleary, Luai, T'oo, Crichton etc would be only a 3
The more that incentive for home grown the better