First off I think the list of vehicles Simeon gives you via text is pretty good. They are pretty hard to find sometimes. (Quick question, after you find one, the list goes away...do you still need to find the rest? Never tried it.) Anyway, I digest. I feel like Simeon vehicles (missions especially) don't make you work at all for them. The green vehicle icon pops up and BEEP BOOP BEEP - GPS brings you right to it. I think that R* could instead highlight an area or give us a text photo of a car and based on its surroundings we have to go find it. It makes the search a little more fun and sneaky rather than "oh [insert name] is basically right next to it, forget it." This would work similarly to how bounties did for Trevor.
The actual Simeon mission jobs are even worse. Now we actually are on our own (or with friends) in a closed session away from free roam and the cars we have to repo are literally highlighted on the map - EVEN IF THEY'RE MOVING. If there were ever a time to increase some difficulty aside from dealing with more thugs and guns, this would be the scenario. R* basically hands this info to us and it's like we don't have to try at all for some of this stuff anymore.
I want to hunt based on a picture or a brief description. At the very least it would force players to take in the environment that R* took so long to perfect. Thoughts?