1] A have never drafted or seen a good Orzhov deck. I think that 3*GTC Orzhov Archetype was kinda specific and is viable no more. Also when you force Simic or Boros, then you have 2 premium common creatures in GTC that nobody else is interested in. Orzhov have only Kingpin’s pet which will be taken even by non-heavy-in-Orzhov drafters.
From your pack I would choose Lawmage, Boros Guildgate would be probably an option as well. Maw is overvaluated, i think that card sucks.

2] I can see an argument for Haazda Squad If you plan to play Boros. It forces Boros better then Turn/Burn. Since it is monocolored it also leaves you quite open, especialy to Azorious where it can be quite good.

3] I think that Turn/Burn is little better than Beck/Call but the choice is rather stylistic.

4] I am fine with picking Gates early but not over such powerful spells as Turn/Burn or Beetleform Mage. I would also point out that if you want to draft 5c control then cards like Prophetic Prism and Transguild Promenade fix your mana much better than Gates. People sometimes pick those gates very highly just to make their Gatekeepers playable but i think this approach is suboptimal.

Because of that it might be better to pick more expensive spells and mana fixing in DGM and take some two-drops later. Exception is maybe Kraul Warrior, which is a card i like a lot because it is monogreen and very flexible. Also I think that if you decided to pick Deputy and ship Beetleform Mage on P2p1 anyway, it would be more reasonable to stay out of Simic and rather take Dimir Guildgate on pick three?

I feel like you’re not giving enough weight to how hard it can be to actually cast deputy on turn 2. It can be pretty tough as you can’t really go base azorious until the last pack, so often you end up in base simic and deputy is rarely castable on turn 2.

Answers:

A) Probably lawmage, because i think it’s that good, but Maw would obviously keep you on Orzhov.

B) Can’t see an argument for first-picking snare squad. It goes best in a Boros deck right? If that’s the case then burn is just better IMO.

C) Turn/Burn is often a 2 for 1, kills anything for 5 mana, and it’s even a good card if you’re not blue. I think it requires less of your deck than Beck/Call and is just as good unless you’re fusing Beck/Call. Both those cards are rav guilds, so I don’t think the guild structure puts one above the other.

D) In weaker packs I can see taking the guildgates, but those packs were all so stacked I don’t think you can justify it.