in fallout 1 and 2 you could take silent run feat and just run while being stealthed, that made a very nice gameplay...
my idea could be to make stealth speed almost equal to normal running speed without enhancement buff (striding)
and then stealth training enhancement raising it
here is a simple example:
while stealthed you cannot benefit from striding effect or similar effect to run speed
stealth makes you move at 90% of normal running speed
each tier of stealth training raises your stealth speed:
stealth training 1 makes stealth speed equal to normal running speed
stealth training 2 makes stealth speed equal to normal running speed with 10% striding
stealth training 4 makes stealth speed equal to normal running speed with 30% striding
this would make sneak party friendly, especially pug friendly...