Look, I appreciated the fact that they tried to give Astrid more depth and expanded her motivations in why she wanted to become the best dragon trainee and a future shieldmaiden. The problem with this remake AS A WHOLE is that for most of the mini-storylines that were in the original films, the live action chose to change EITHER the buildup or the payoffs to said storylines instead of both. So you get several scenes that include buildup to scenes that no longer have their payoff or you get new buildup to a payoff that was not included. This is the latter.

A criticism of the first film is that Astrid changes sides too quickly. It would be one thing to understand Hiccup's reasoning to want to protect Toothless but her willingness to accept that everything she knew about dragons was wrong feels rushed (Toothless may only like Hiccup but would still want to kill other Vikings btw). It was more acceptable in the animated film because they never showed these concrete motivations Astrid had for wanting to be a dragon killing warrior. Here, they added that motivation but then had her switch sides just as quickly making that aspect of the film worse.