That was exactly what I wanted from ORAS. In RSE, even at the end of RSE, when we battled Wally at the victory, I felt Wally still had a weak character. Sure, he had developed since you met him, but he wasn't the trainer you originally thought he's become. ORAS made sure that Wally developed his character in a good flow. He felt very confident, comparing to him in RSE. It was as if a new person was disguised in the original Wally.
Not to mention, he gave me a harder time battling him. I just felt that his pokemon were WAY stronger then in RSE. To show how much he developed, when you met him both in RSE and ORAS, he had a similar character to both, but at the of RSE and ORAS, the ORAS was way more confident than the RSE Wally.