Would this crown be considered aethetically acceptable? (photos)

I am not sure of the material of your permanent crown as it is cement retained but looks like composite or resin material ( the air bubbles on the occlusal and mesial aspect, which is usually temporary) I can see the cement line, but the contour on the mesial aspect could be widened to close the embrasure space and there should be a tunnel design that extendsto the furcation (between the roots) to keep it clensible and prevent plaque formation

What is aesthetically acceptable can vary from person to person. What should not vary is the function/adaptation of the dental restoration to the tooth. From the x-ray it is hard to tell, but does appear that the crown is fully seated and has acceptable marginal adaptation (meaning the crown fits the tooth and there are no visible areas of openings between the crown and the tooth). The aesthetics can vary based on the dental laboratory used and the quality of the restoration. It is too hard to say without a clinical examination if crown lengthening was needed or not. Irregardless of the crown lengthening, the crown can be designed to close small spaces between the teeth/gums which allows for proper at-home hygiene which along with function should be what determines if a restoration is acceptable or not.