-아/어도 concedes a minimal action and 느끼다 says the effect lands anyway: 보기만 해도 느껴지는 짜릿함, 'the thrill you feel just from looking'. The usual shape here is -기만 해도 or -만 해도, 'even only that much' — 전공만 말해도, 기본만 해도. It works as a compliment as often as a description, saying the quality is obvious with no effort required.