Sometimes it blows my mind how much we lose it on these threads. It's not all that.
1. If Minthara is the norm Drow of the game, and in Act 2 we reach Moonrise and see a ton of Drow with her short hair look, and such, it STILL wouldn't make a difference. They are ALL cultists of the Absolute and will do whatever the Absolute wants. If the Absolute wants them all to paint their faces with pink pokadots, that's what they're gonna do. It doesn't matter WHAT normal Drow society does. Absolute (ahem Larian ahem) don't care.
2. I get it that people like her previous look better. It's a matter of opinion. That's fine. I got no problems with someone who says they liked the other Minthara better. I think new fits better, but I'm not opposed to original coming back or them trying yet another look. This shouldn't make or break the game, but for some it might. Imagine someone taking a beloved character like Darth Vader and changing his whole look. That's what this is for some people. The new look just feels wrong to them.
3. Whether a Drow is typically long hair or not, wears makeup, etc., absolutely nothing says they ALL have to be that way. In fact, D&D has always encouraged creating your own, unique characters. Want a Drow with short hair Go ahead. Just because someone somewhere created a lore that Drow typically have long hair and dress seductively doesn't mean that ALL Drow everywhere throughout all time MUST have long hair and dress like prostitutes. They don't have to appear feminine. They don't have to be a certain way at all.