With the results of the MTG Arena major tournaments last weekend, we get a tally of the decks that got the top finishes. I am happy that the metagame has no dominating archetype as observed in the past weeks. Saying that it is balanced may not be the same though as it depends on the number of players piloting a certain deck whether it composed almost half of the total attendance.
We have the following decks in the category of Top Tier Aggro in the Standard metagame as of March 1st. This is sorted as per their performance in the past month (February 2021).
1st Red Deck Wins (Percentage in the metagame: 10.33%)
2nd Gruul Adventures (Percentage in the metagame: 10.10%)
3rd Naya Adventures (Percentage in the metagame: 6.27%)
4th White Weenie (Percentage in the metagame: 5.50%)
5th Mono Green (Percentage in the metagame: 3.35%)
I have referenced to the website MTG Decks dot net. Full URL here, deck lists and other info. https://mtgdecks.net//Standard