“My question is however, with a practice as described above, is it really possible to heal and release deep traumas such as I have described through a consistent practice of yoga asanas?“
No. You have misunderstood the function of those asanas. They are not intended for anything else except to prepare ones mind and body for the work of meditation. Problems which arise at the level of the mind can only be dissolved at the level of the mind. You can practice these asanas for ages, by themselves it is not going to be of any help as far as understanding your own inner workings are concerned. For that, what is needed is to deal with the mind directly, to observe the workings of your mind.
“As the practice deepens, does one generally come into contact with deeper and deeper aspects“
Forget about any deeper aspects entirely - whatever has not entered in ones own experience has no relevance at all. Just come to an understanding from the very seat in which one is sitting, and then the next step will reveal itself.
“Particularly how I feel after the Birkam.“
It is good that you feel good after it, but coming to more awareness of oneself has very little to do with feeling good. The fact is that what you enjoy from the practice of Bikram yoga is just a temporary fix, you become under the influence of the drug but once its effects have subsided, and it does very quickly, you return back to your ordinary patterns. Something like the so called Bikram yoga may be useful for this, but as far as having insight into the root causes of ones suffering at the level of the mind - it is almost useless. Because Bikram yoga has no place at all for meditation.
“Does anybody have any further recommendations on the best course of action for me? I also meditate daily“
Go deeper into your meditation with more discipline and commitment.
“Also, I know that the asanas are an incomplete method in themselves in transforming consciousness“
No, they are not an incomplete method for transformation, because they are not methods for transformation.
“the effect that the postures have on the subtle body / chakras and the release of emotional blocks, must surely facilitate some vertical growth in consciousness as a stand alone practice“
As a stand alone practice, it is nothing more than exercise. But you do not have to believe me. In fact, I encourage you to go deeper into your asana practice, if there is anything more to it as a stand-alone practice, it will become revealed.
Yes, it can bring about certain changes in the subtle energies of ones system. Just going for a run will do that. Just something as simple as putting your hand in a fist will do that. It is important to understand that as a stand alone practice, it cannot do anything else except create a foundation. And a foundation which is standing by itself is a useless foundation. Because you can detoxify the nadis out of the practice, and yet on the other hand do all kinds of things to fill them with toxins and blockages again. If one wants results from these methods, this is not the kind of thing which you do as a side-project. One will have to change the whole way of ones life so that everything becomes supportive for the practice. If you are doing something like practicing on one hand, and yet smoking, drinking alcohol, eating foods or drinking drinks which are filled with all kinds of impurities, being dishonest both to yourself and others, hypocritical, then certainly any effects that had been done will quickly become undone.