I dont think more guides are better...but I think the length and action of the rod will determine how many guides you need.
Typically you would want the line to follow the blank when its in a bent position and not create too large an angle from guide to guide.
For example...in say a seven foot rod:
For a medium action rod you may have the first 5 guides from the tip: 10,11,12,13,14 covering 60 cm.
For an extra fast tip you may have the same 5 guides from the tip: 8,9,10,11,12 covering 50 cm.
Eventually having 1 more guide for the extra fast rod...so it just depends....and not everyone looks at it the same.
As for casting distance (friction) and sensitivity...some others may have a lot to say about that...I just take it as it is.