Hello I don't think 1♣ Pass 1♥ 2♦ 2♠ would be reverse, it shows 4♠ and 5♣ a good hand (13/15) but not reverse. However, 1♦ Pass 1♥ 2♣ 2♠ would be reverse! My understanding is that when the responder could fit the opener first color at the same level as the opener could have done by repeating it, there is no reverse. First exemple 1♣ PASS 1♥ 2♦ repeating the ♣ would be at level 3, so 2♠ being less expensive than 3♣, it is not a reverse. Segond exemple 1♦ PASS 1♥ 2♣ repeating the ♦ would be at level 2, so 2♠ being less economical than 2♦ it is a reverse. Hope this is understandable, my english is quite limited.
