Someone in league found a flaw in how older players decline in training camp (TC). Training camp allows only increases in position skill OR ratings, never both for players under 30 position skill. So if the player is below 30 pos skill at a position, in TC they will only get a position skill bonus but no rating changes. This isn't a big problem for most players, however it seems that also holds true for rating decreases. So you can move an older player to a position he is under 30 position skill in, then he won't decrease any ratings in TC despite being old it seems. The only change this older player will receive is their POS skill boost. If true, Sort of an easy way to avoid aging regression.
To avoid this workaround, some changes might need made to position skill jumps in TC and how it relates to other rating changes (or lack thereof).