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If all this does is draw you dead cards in hand and yet still seems good then it is clear that cards in hand is a valuable resource, regardless of what they do or do not do themselves

Counter Blitz took me by surprise

With a Haste granter like Enduring Courage you can swing with your newly-made Summoner right away, and put any creature you want from your hand into play

If you do it every game and tutor aggressively to do just that, people will say Oh, thats ALL that deck does and will probably be NOT OK with it

A lot of mastering Affinity (and any deck in Magic really) is about developing a strong intuition for what to do in each situation, and the only reliable way to do that is by repetition through practice.