I've stated this less precisely in another thread, but I wouldn't count your Determination chickens just yet. We now have the precise knowledge that an i110 weapon has 75 "points" of secondary stats attached to it.

Examples:

Rosenbogen: 31 Crit + 44 SkS = 75
Leavateinn: 44 Acc + 31 SpS = 75
Conquerer: 44 Acc + 31 Crit = 75

However, some weapons do not have 75 points in stats:

Glanzfaust: 44 Acc + 22 Det = 66
Book of Spades: 31 Crit + 31 Det = 62
Burtgang + Noct Shield: 22 Acc + 13 Acc + 22 Det + 9 Parry = 66

These three weapons have less than 75 points, and the one thing they all have in common is that Determination is one of their stats. We've known for quite some time that Determination is weighted more on gear than other stats. Therefore, it would appear to be the case that despite all appearances, Determination is probably counting as slightly more than one "point" out of your 75 every time you meld it. Weapons with 44 in one stat have 22 in Determination. Weapons with 31 Determination have 31 in another stat.

Using the Glanzfaust and the Book of Spades as examples, it would appear that each point of Determination accounts for approximately 1.41-1.42 points each out of our 75.

The Math:

Glanzfaust: 75 total - 44 Acc = 31 points left. 31 points / 22 Det = 1.409
Book of Spades: 75 total - 31 Crit = 44 points left. 44 points / 31 Det = 1.419

Therefore! It is my theory that if you meld 31 "points" of Determination into a piece of gear, it will give you an actual value of 22 in the end. If you meld 44(if any weapons even let you...), you will get 31.

If you want to think about other values of Determination, you can probably get a pretty accurate representation of actual values by dividing (Determination Points) / 1.41 and rounding to the nearest whole number. It's not terribly precise, but it's likely close enough for our purposes.

In conclusion, I don't think that Determination numbers are what they appear to be. We might get lower numbers at the moment of the upgrade, but it wouldn't be fair to people who didn't choose Determination if Determination choosers didn't have to meld 75 points too.