Looks like when your upper veneers were placed the lower teeth shade was not taken into careful consideration. Lower teeth are statistically more "stubborn" to whitening process therefore one needs to carefully moderate the degree of white shade while restoring the opposing arch......
The bulky appearance you are unhappy with is a common problem with No-Prep Veneers and that is largely due to case selection. No-Prep Veneers can produce beautiful results if performed on the right patient. Since no tooth structure is altered to make room for porcelain, No-Prep...