I think it depends on what style of guitarist you want to be. Slash has openly admitted to despise working on music theory and says he goes off of his “ear” more than anything, and eventually has learned patterns that work for him. However, we can all admit that Slash is a very monochromatic player. He’s damn good, but he’s damn good at writing rock n’ roll and blues stuff. He has a couple of Spanish-style influenced songs but it’s minimal. Also, you take Dimebag. He said he made up his own scales and never spent much time on music theory. However, the fucker was LIGHTNING on the frets and still composed some mind-blowing acoustic work. Some stuff I couldn’t believe was Dime. I think it be best to look at who you idolize the most and you drives you the most. The person where you say “I want to be like THAT guy/girl” and do what they do.
I really wish people would understand just how much players like Syn are very rhythmic when they play their leads. If you really dissect his playing, there are very distinguishable rhythmic feels he does, and I believe that stems from him jamming a lot to backing tracks. He understands melody very well, because if you listen to his solos, about 95% of them follow Matt’s melody in someway shape or form. Or there is some lead hook in there somewhere that follows Matt’s vocal line.
I can admit though, I think 5 minutes on each technique is not enough. It doesn’t matter what kind of guitarist you want to be. Even bands like Blink 182, Guttermouth and CKY spent HOURS a day practicing. Although they were writing songs and rehearsing most of that, they still have certain techniques down really well (fast down-picking, anyone?)
I think songwriting IS crucial. But in order to write good songs, you have to know your instrument. For me, it took me about 4 hours a day for about three weeks to get the sweeps down fairly well in HTTK’s solo. I have a toccata technique in one of my solos, and it was a BITCH. I think of it this way a little bit:
I learned recently by my own experiment with the school that spreading yourself too thin and trying to accomplish many things with little time is not efficient or proficient. If you were to practice sweeps for several hours a day, you’d become fairly okay with it in probably a month’s time. Not a MASTER, but you’d get the technique down. Keep this in mind, Syn said it took him roughly 2 years of practice before he could effortlessly incorporate economy picking into his playing. I think patience here is key. Keep practicing stuff. But it’s going to take time AND lots of effort.
A fitness quote I read said it best: “enjoy the ride because you’ll never get there.” What this means, is that when you reach one goal, you have another one you’ll want to achieve. And then another. So don’t focus on the ending point. It will never happen. Just enjoy it and don’t stress yourself out
I hope this long-winded answer helps.