Hi aidaonpluto,
to the site!
Your Hoya looks great to me! My hoya plants often have leaves that are variable in shape and size. I don't know if it's related to culture (light, water, heat, humidity) etc. or what but it doesn't seem to cause any problems. Your profile doesn't show where in the world you live but you should see a change in growth during the warmer, summer months when plants are in active growth mode.
