Si R B

Hi. Just had some work done on my outbuilding roof in Victorian house. Roofers used dry system (wasnt aware this was the plan.. ) the ridge is eye level and I think it looks rough. Any suggestions? Can these gaps be capped in some to look more in keeping with the building? Not a roofer so not sure if this looks right but not been happy with the work so far and would appreciate any advice Cheers