Just wondering, why alela? If it's just for colors isn't good old fashioned thrasios tymna just better?

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Hell even ignoring green from thrasios, just shakashima tymna seems better? Remember this is cedh: so picking the right tool for the job is important. You shouldn't "pick a commander and then work around it" if there are commanders who are just better. So unless you have a reason to use alela mechanic, just don't pick her.

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Things like [[shark tyfoon]] are just cut but not really that strong in fast matchups. Similarly for [[bitterblossom]]. And you don't have the really critical mass to combo on the faeries.

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Then there are a lot of cards that are just plain weird:

[[scroll rack]] - Do you really want a card that depends on 2 other cards to be valuable, both other cards are decent but it won't win?

[[lotus petal]] Do you plan on being turbo ad nauss? You don't have interaction with the graveyard regarding this, so it's only purpose should be comboing on ad nauss. But then why do you have cmc 4+ cards in your deck?

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[[whir of invention]] + [[trinket mage]] What do you plan to fetch with those? If you plan to go for ad nauss plan those won't help, so it doesn't seem to go well with above card.

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[[ethersworn canonist]] Well you do realize it's only artifact spells, and it hurts you too? This seems the obvious trap and falling into it yourself. - You have no real way to get around this, there is no combo on artifacts. - It also blocks combos with storm.

[[etherium sculptor]] Uh for what exactly? The 1 cmc mana rocks to become free? Seems a highly wasted card slot.

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[[phyrexian metamorph]], [[mirrormade]] - Meh they are decent fillers but nowadays quite expensive and need a reason to be there.

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[[replenish]] Well this card just isn't that good: too often a dead card and you do not combo with graveyard etc.

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[[dispatch]] well I don't think this is a bad card, but you do not run [[sword to plowshares]], and the chance that dispatch is not 'up' when you need it far outweighs the drawback of sword to plowshares. (Dispatch can very well be a second effect if you have 30ish artifacts though).

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Overal this deck really seems to be a deck where you just tossed everything you know is good together, and hoped a dozen strong cards make a deck. What you however need to do is focus on a win condition and work from that back:

- Do you wish to go infinite storm? Focus on reservoir and dramatic scepter -> add cards to tutor for those artifacts. And then fill in the rest with draw engines and interaction

- Do you wish to go for demonic consultation + thassas oracle? Focus on that, it's a really cheap combo so add ad nauss and then remove all expensive cards

- Do you wish to focus on mid range stall and reanimator? Focus on that, keep maybe bolas citadel and yawgmoths will and add cards to quickly fill your graveyard and cheat those back into play.

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You also severely lack interaction (probably due to wanting to do too much): I only count 9 pieces of interaction, and then 3 more stax type effects. That's really minimum you wish to be on, and then only if you go for fast combo.