It's an almost impossible question to answer. Default weights are not for me, they are (usually) very vague and non-descript.
As an example, I set mine based on every attribute that I think contributes to a players specific position. I want my RB/FB and TE to all have speed, acceleration, strength, good hands, brave, good blockers pass and run, high break tackle is a bonus, avoid fumble is also important. On top of that they need to have very good ball carrying
There are areas I will accept being weak and there are players I'll skip just because they don't have one thing that I see as imperative for that position.
Basically, I don't think the weighting should be different between the two formats. You just have to decide what sort of player you want to fill that role. IF your weights don't point you towards specific players, then you need to tweak and refine. Find a player to fit your philosophy, rather than trying to find a philosophy for your players. As an example, in the dispersal draft for Legends I sought players with the five fundamentals (speed, acceleration, strength, intelligence and discipline) and worried about the technique elements down the line.
These days, I want it all and often raise eyebrows in trades by 'over paying' for players with low default ratings but show up really strongly in my weightings. It doesn't make me right or wrong just that I'm getting the style I want. I also love versatile players, so the more 'weights' I put at each position allows me to quickly see whether a player could 'do a job' elsewhere even if his overall ratings don't support that.
Having players rated in the 50's and 60's that outperform players in the high 70's/80's isn't that unusual and the best teams are often loaded with players on these sort of overall ratings.