why black? black doesn't give any real benefit to landstill other then the tutor.
That is 100% false. Black offers a sideboard flexibility that is extremely usable in the current environment, Yawgmoth's Will, and Duress along with Tutors. I'm sure that there is more out there too.
Right now, this is probably U/B Landstill's best time to shine, if it ever will. Of course, that is assuming that your area does not have too much aggro and you have the proper sideboard material to handle yourself. This deck can contend.
Finkel does not suck in this format. Ophidian does not suck in this format either. You might as well have said that Standstill sucks; it makes about the same amount of sense.
Since you have a very limited amount of duals, you are better off running white OR black, but not both. Once you decide which color to run, get some Mishra's Factories and Nevinyyral's Disks if you can.
Shock Wave's Landstill primer might help you out as well. Good luck.