Personally I find this change concerning. My background, to give some idea on what I’m basing my views, is that I’m a psychiatrist working within the NHS, and therefore have a professional understanding of gender dysphoria. That said, it’s not an area that I specialise in.
In my experience, despite the fact that there clearly are a number of people who truly do experience gender dysphoria, I also think that the increased awareness of this (particularly in younger generations) has lead to a not insignificant number of young people attributing their internal feelings of turmoil to gender dysphoria. The problem with that, though, is that there can be many other causes of such feelings, including normal teenage angst, personality disorders and adverse childhood experiences. These causes can de difficult to accept/address, and none have easy solutions/treatments, so for anyone experiencing internal distress as a result of these, the thought that their feelings might be due to gender dysphoria can be appealing, particularly due to the apparent solution to their difficulties (ie transitioning). The not insignificant number of people who experience post-transition regret I think evidences this to some degree.
With that in mind, the removal of the requirement of a medical diagnosis is, in my view, worrying, not just for the potential impact on cis-women and their rights (which is a whole other debate I’m not going into here) but for the swathes of young people who believe they are being offered a solution to their problems that might actually create further problems for them going forward.