The fact it is basic with 100 hp and can turn 1 take an energy and then you can dump into celebi while serp lvls up and then you can pop off a 90 before it dies/ gets switched makes it amazing for the turn flow. This isn't pokemon live where you can play solitare on a turn. The flow has to be working and eggs just makes you want to focus on it when it isn't your win condition, disrupting the flow. If you do better with your deck maybe it is just your play style but overall I am better off with a dhelmise, and more intimidated by the opponent's.