Going full time would see an increase in the number of hours players (1st team to youth team) receive in coaching which would see an improvement in their development. However, I did say that we'd need to improve the current coaching and coaching techniques in order to see this.
When I think of Clubs feasibly going full time I think back to when St Johnstone were part time in the 80's or Kilmarnock & Queen of the South were in the 90's as examples.