For your 1st point, thank you. Your reasoning makes a lot of sense, and it's good to know that it's a major goal.
For your 2nd point, can you clarify a bit on what exactly do you mean by the "lackluster" feeling? It just seems to introduce unnecessary RNG to the reward system, something that you have clearly stated that you would like to avoid. Basically if you try to finish 1500 dailies only every week, it means that you have a half a week (3500 exp = 3.5 days) extra from the rest of the players, which is a huge advantage.
Just to give you an example. Today I got a 500 gold quest "play x colors" in MTG:A, which is in my current best deck (Golos Fires) colors. Somehow I managed to painstakingly win 4 games (2 BO3 matches) without actually finishing that quest. Now I really enjoy this deck and want to play more, but it's not optimal for me to do so, so I'm going to just turn off the game and wait until tomorrow for the quest reroll. Basically I really want to play, b...