So would you want multiple points flashing constantly? If you are using multiple points to track the subject, I would think you would have a pretty bright VF. Would you have been able to effectively see the subject at that point. Cool photos by the way. They really look bad in the thumbnail scale, but when you go into them, you can really see some decent detail there, and the shallow depth of field is nice.
I usually use AI Servoe with one point and I keep that point on my subject. Center point is easiest, but I will use others, I just need to remember where they are.
Another workaround other than pushing the AF selector button is to change your orientation from Portrait to Landscape or vice versa. The indicator of how your af point is selected will show up. this might be tied into having a separate vertical point from a horizontal point. It works for me though. It is brief, but it helps. Especially if you had gloves on or something and could hit buttons other than the shutter button. It could happen.