Is it possible to round-off/reshaping my E-max veneers? (Photos)

It is possible to reshape the veneers. From the photos I can see, the veneers do not follow your natural contour of your lips and smile. Usually we need to remove the old dentistry and place correctly fabricated restorations that follow your facial aesthetics. More importantly we need restorations that allow for proper biologic form and function. You mention you had a anterior open bite. Sometimes this can be corrected with veneers, however, based on the photos there may be something a little more going on with the bite/function. This can lead to not only possible problems with the muscles and joints later in life, but can lead to uneven pressure/stress on the teeth. The veneers as you stated looked "squared off and jokerish". This is because of the design and porcelain ceramic used. To look more natural and life-like, we need to have the veneers designed and finished by a master ceramist.

Good morning. If I am to understand your submitted photos, the top picture was your teeth PRIOR to any treatment?
If that is so, these restorations are completely overbuilt, bulky and poorly contoured. In my opinion, there is so much that needs to be adjusted, I am afraid the finish will be ruined--- therefore, I sadly would suggest that they be completely redone. ( make sure if you do that, to approve a tryin before allowing them to be bonded)