'Even if they don't evolve, my abilities are already very powerful. I bound these abilities to my Essence because they were a necessity to survive, not because of any other long-term goal!'
That was Dilan's thought when he began mulling over the question of whether he would regret binding specific abilities to his Essence crystal if they wouldn't have the 'potential' to evolve.
He didn't regret choosing the abilities he had bound to his Essence crystal but if he would receive the chance to change his choice, he would probably do it.
In most situations, one could have made a better choice but that didn't mean the given predicaments at that time allowed a better choice. Thus, Dilan was more than satisfied with his overall decision, which he put to action by turning into a flash after he had activated [Switch], [Walk of Thunder], and [Second Acceleration].