But don't the intel drivers mess the settings fo the surface pro, like sleep and power management?
They do eliminate any presets Microsoft has setup in the drivers, but I've yet to actually notice a difference in battery life or have any issues related to the GPU drivers. I've been running Intel drivers on and off since October without issue.
The biggest benefit before this latest round of March drivers other than the usual bug fixes/optimizations was the Intel drivers allowed access to the full Intel Control Panel, but I noticed yesterday that with Microsoft's March drivers, while the icon isn't there, a right click on the desktop allows access. Not positive it's a full featured Intel Control Panel but it's a start.
My advice would be run the Microsoft drivers until you run into an issue (like the Titanfall problem) and then updated to the Intel drivers and see how they compare. Only thing to be wary of is once you install the Intel drivers, Windows Update will try and automatically replace them with MS drivers unless you tell it to "hide" the update.