Depends. I've read the inherently temporary nature of the Republican reservist armies tended to make them somewhat tactically unsophisticated - critics point out they tended to win their battles more with brute force and sheer stubbornness than clever tactical maneuvers. The longer the soldiers were on the field the better they naturally became at operating and maneuvering as formations, but once the legion was disbanded back to its civilian pursuits the whole process had to be started all over again when the next call to arms came. The Roman idea of warfare was apparently also somewhat excessively focused on linear clash head on, which in turn tended to lead to an over-eagerness to get to grips with the enemy also among the commanders and every now and then got the legions into serious trouble.
Just ask one Hannibal Barca.

'Course, ones having to deal for example with the hit-and-run tactics of mountain tribes such as the Ligureans and many of the Iberians naturally quickly learned to be more versatile and careful.