Blepharoplasty caused incomplete blink which caused MGD and many issues, could surgery help?

The evaluation of your eyelids properly, can help to determine what type of surgery can help you. If you have sclera show this needs to be evaluated farther. You may have cicatricial ectropion and that could be secondary to posterior lamellar shortening. if that is the diagnoses, you will need to have hard palate grafting or some type of grafting to help lengthen the posterior lamella. If there is laxity of the lower eyelid, then you need to have tightening of the lower eyelid and if there is shortening of the anterior lamella, you need to have skin graft or midface lift to help with the lengthening of anterior lamella. this question is not so easy to answer without proper evaluation of yuor eyelids. 

Sorry to hear about your troubles.In general, if the lagophthalmos is mild as you describe,  your meibomian gland function shouldn't be affected that much. It may be you had dry eye that got "pushed over the edge" by surgery. Before and after photos would help the doctors here understand your particular situation better.Consider unfrozen autologous serum drops twice a day for two months for your current issue as it can often help a compromised ocular surface. 

Thank you for your question.  Sorry that you are having issues after your surgery.  Lower lid malposition and lagophthalmos can occur after eyelid surgery for a number of reasons.  It is difficult to give you sound advice without viewing photos or examining you in person.  I recommend reaching out to your board certified plastic surgery who performed the surgery to address your concerns.  Sometimes a second opinion can be helpful as well.  Good luck and I hope this helps.