My plan was to maybe find some fan artists on deviantart and ask them to do it. :pNot quite Kojima’s dreamy pastels, but it might work for Arikado perhaps.
For Julius, we might actually be able to use both mine and yours as different reactions, since the original anime ones are drawn from different angles too. Yours seems more neutral, while mine is moodier (second reaction).
I wouldn’t go overboard with the reactions. They could maybe be reduced to a few noticeable ones. The first three of Soma’s are pretty similar, for example.
I completely agree with the last paragraph, we could very well ditch most of the reaction portraits that seem to only add a few things like an open mouth or such. (Although I want to give Hammer's reactions I try, they seem to be rather easy) XD
And yes, going to DeviantArt is a great idea, the problem is that I can't seem to find any artists who are willing to do that, or even worse, that match Kojima's art.
If you guys find any artists, bring this topic to their knowledge, and let's hope they are kind enough to do the portraits for the remaining characters (at least for Dawn of Sorrow, Portrait of Ruin might come later).