Hi there, Daniel. Those pictures are definitely a big help, 'coz from your description, I had a different image in mind. IMHO, from the pictures of your room, the right side of the room definitely needs some treatment. This is compounded by using Thiels (you haven't heard Thiel 3.6's yet in small rooms). Holly Cole's "Don't Smoke In Bed" is a good test track, there is a part which can really boom in certain rooms, with overemphasized and muddy upper/midbass.
I would still recommend to treat the room first with a Room Pack (the white ones which you need should be arriving soon), not one or two pieces, but the full Roompack to appreciate the improvements. You may need some extras due to the pillar you have on the right. The treatment - to quote a customer who has given up on EQ - "simply reduces room modes and offer a more natural flow of music in the room."
I am very sure the full Room Pack will have a very positive impact in your room (or any room). We can then ascertain later if we need to be more drastic, then placement of the Framed Responses on the right side, including the pillar corner (one Framed or stacked per wall corner) will surely solve it. Again, to quote a customer -"the extra pair of Framed worked like a charm and I had fun in experimenting the pairs as absorbant or reflective purposes. As yet, I've stacked up 2 of these on each side; the lower to absorb and the upper to reflect. Marvellous results!"
To check out how a stacked pair is done, just look at our hifi show room on this link:
http://www.6moons.com/industryfeatures/singapore03/singapore_3.htmlJust look for the picture with the Eighth Nerve Floorstander in white in between the Living Voice speakers. Without the Eighth Nerve treatment, we would not get such good comments from showgoers. The public has spoken, it's for real

Of course, many are pinpointing the sound to the speakers, or amp, or turntable, or cartridge, etc. The fact is the room was the first frontier we had to tame.
Anyway, when the stuff arrives, I can help you mount them in your room, and you will notice the difference proper room treatment can bring to a room, the most important component in a hifi system.
Of course, I do hope the Audio Notes can control the Thiels well enough ...