No, it's not a problem and yes, you are obsessing which is why I can understand exactly where you're coming from [:)] But others have said it best. Focus on your target and the FS will disappear like it's magic.
[b]Do not[/b] get a riser to elevate the EO Tech above the FS. This will kill your cheekweld unless you're wearing a gas mask. ARMS makes a QD hi-rise mount for the EO Tech that was specifically designed for operators wearing gas masks. Besides, raising the optic even further above the bore line isn't a good idea either.
You can always consider getting a folding front sight. I've got one on one of my AR's but I like the fixed sight more. One less thing to worry about breaking and, since the whole point of backup iron sights is to have them as a backup in case your optic goes down, it makes sense to have them a Murphy-proof as possible.