I really thnk that bumper looks excellant!front arch i think if moulded or should i say smoothed into front wings id personally like more, the rear ones i cant decide on! i think having them smoothed wouldnt work as well, as i think they gonna give a nice agressive rear look, or maybe just smoothed as in smoothed sharply not gentle curve if that makes sense!!
But having it all one colour and the bolt holes smoothed over like you say, will change the look.
still loving the front bumper, reminds me of a Celica one i saw, but that had Carbon fibre i guess you could call 'downforce blades' coming out on side, bit like the lumps on yours. Is that your other supra on ramp next to it?