The snow to training ratio is 1/5 so it gives you a good idea what the presents will be like.
Player presents are kind of obvious. All of the presents that quick sell for 2140 should be 90s. They're 100% considered heroes due to the pack in the store being a hero or champion president, but I'm thinking there's a chance some could be 91 overall. The player presents that quicksell for 8440 snow are 93 and 94 overalls. If it has a large present bow it is a 93 and if it has an XL present bow it will be an LTD 94.
The program presents I think are going to be the most volatile. After last year, they could absolutely be brutal and a massive coin sink. Using the snow to training ratio you should be able to get an idea whats in them. The code name present sells for 600 snow, so it's worth 3000 training. An 86 overall quicksell for 1700 training so an 86+ AKA pack does make sense here. Scary presents are 300 snow, so worth 1500 training. I want to say an 84+ would make sense here but these the cheapest present in the game. These are tough because an 82+ would make this pack absolutely garbage and sets the tone for the rest of the presents. If these are 82+ then that code name present is probably an 85+ and so on and it gets real bad real quick. I'll go over one last one, the replica present. This is a 1210 snow quicksell, so worth 6050 training. 88+ redux is the most likely here. 89 would be profit and 87 is just too low. Kind of sucks since you know where this heading, any program present quickselling for 3660 snow will be a 90+ pack. That would a massive loss considering an extra large costs over 250k. 93s will be going for less than that on Christmas day.
The generic presents are easy to based on quicksell value. Smalls are 82+, mediums 85+, large 88+, and extra large 90+.
I hope I'm wrong. There's a chance EA bumps those packs by an overall or two considering this is a Christmas promotion. It's gone both ways in the past so who knows. There's also the higher than it should be chance EA complete screws this up and that happens to be in our favor. I don't know. I'm all in on presents though cause I think they're fun but I'm anticipating a complete beat down.