cofuzzeled, and even matt missed it here...
If you are saying there is no difference between a lvl 10 and a lvl 30 then what are you complaining at?
Having checked all of mine, it actually displays the FASTEST build in each lab (based on your highest lab level)
[i will probably need correcting here, but simply upgrading a level doesn't add a bonus, it simply reduces time]
I gurantee, if you remove your 75% cap, there will be a noticeable difference between a lvl 29 and lvl 30, let alone a lvl 10 & lvl 30