What to say...that ones are not main quests, but "companion mission". They give some extra choice at the end, nothing special, and in any case the added just few hours of extra gameplay.
Truth is that the game was poorly and hastily developed
Except that you either didn't do them, or you have a bad faith
All the side quests are particularly well written... (Panam/Judy in particular, no need to mention others like "Dream On"). But if you "rush" the games and find it too short, it's your choice
(ho..., the game is so short, i use TP pts all the time, i didn't do any side quest, i skip all the blue dialog option, i didn't read any computer/shard... my god, it's really too short...)