Hi -
Of course this is a generalization yes 
In fact, for thin, flat and tall parts (eg. base of an enclosure) the best for me is to print perpendicular to the build plate.
I am with @henryqiu on this one - printing parallel to (or directly on if you can) the build plate is probably your best chance. Splitting this would have been my approach as well.
When printing parts that need to be dimensionally accurate, (eg. forms part of an assembly) FOR ME at least the best way without fail, is to print them directly on the platform whenever possible. To the point where if not possible, I would redesign the part to be able to do so.
The only challenge I have faced with this is when curing Tough 1500 @ 70C… it can warp depending on the geometry of the part due to the lack of support structures. I recently printed a part that required no more than 0.1mm tolerances using Flexible 50A material. This part had to fit into a machined aluminium enclosure. I gave to very little to no chance of success especially as I had no experience with the material. That said, the part printed perfectly and the fit was 100%.