I'm a cancerian lady who has been with a Sagittarius man for over 18 years. I would say that your 'lovecal' is fairly accurate ! Although my man does get very jealous/possessive and I am happy for him to have freedom to pursue his sports interests while I cook tea and hold the fort at home!!
It works for us. Lovecal is just a bit of fun and it can certainly highlight strengths and weaknesses but like all relationships you need a balance of give and take, a sense of humour ( this bit is essential) and a lot of love for yourself and one another.