Well with the cherry I have
Well with the cherry I have not had any problem with foot sliding forward. Even though I run on wet trails, and go up/down steep hills this is not a problem. Though the cherry does have a anti slip characteristics on top. Some of the other materials do not have this characteristic. I believe you would loose that even further with a suede, or letaher footbed. From my experiments the anti slip material is very helpful with my tie method. With that said two things should happen. 1- it helps just in case to have a little extra soling material in front of your toe line (pic added to my previous link). 2- the lacing tightness needs to be correct.
So the lacing tightness. Once you have established the heel with a tight fit(but still able to slip foot in/out. You then have to get the mid foot X tightness proper. This will pull the heel lace tighter, and you just pull through all the excess lace at the front holes. Then sustain that tightness X back to top of heel, and tie off. Tightness should be balanced along all of the lacing. Sounds hard, but it is not in my experience.
Sure my foot moves a little bit on material with the trail running, but very little. It simply has not been a problem for me. Sometimes I even get mud between skin/material, and it is still OK. Just get 1, 2 above and should not be a problem. Just get the lacing nice, and tight. So it is snug to put in on your foot. This is key, but still nice and comfortable.
Video can be found
here of the tie. Working off of two videos. However my video is not detailed with extra front soling material. Discussion on lace tightness. My video just gives general guidelines on what I did(the video plays fine for me by the way abide). Video 1 on above link does provide some detail on lace holes placement. Though you only need front/back holes if you use my method. My method only uses four holes as sonjabean method uses six holes.
This sandal stuff really requires self exploration to figure out what works best for a individual. It requires I find testing, modifications, adjustments, etc to get it right. Though I found for me it all fit together very quickly. My IS lacing strecthed over time which required tightening the slack at one point. I've noticed some people have patience with the sandals, and others do not.
Abide you could use injinji socks with your tie method. I'm more critical on the straps over the toes like you have it, but if it works for you that is all that matters. You should use that if it works for you, but yeah my method is a functional option as well if you get lacing holes correct, tightness, etc.
It sounds like you won't use them much anyway. I only use mine on gravel like trails. I don't run on streets. I just use a natural running gait on trails, and beach. No sandals used on the beach runs for me. So sounds like you don't need them, but maybe you like to experiment with the tie methods. Looking at your pic it looks like you could do my method with your existing holes, but I don't think that lacing you have would work as well. You don't have much extra material in front of toes, but I don't think it is needed if your just asphalt running. Just be sure to "lift" the feet as you run. Are you using the cherry, or some other soling material ?