Will reading Spanish on a daily basis improve my Spanish drastically? Or just a little unnoticeable bit?

Thus far on my trail to Spanish fluency I have successfully completed Spanish 101, 102, 201, 202, and 301. I also have a fianc�e whom is a native of a Spanish-speaking country. This semester I am currently enrolled in Spanish 302, 305, and 351. Three times the fun so to speak. I already have a lot of Spanish piled onto my plate, however, my question is this: If I read, say, 2 hours of Spanish per day, outside of cl time, will I notice a rapid increase in my understanding of the language or will I continue to walk the "VERY slowly but surely" path to full comprehension?