Depends.

Have you been using any other form of study materials besides CC and PTs like PowerScore or LSAT Trainer? If so, definitely take the wait. I didn't mind the CC as an introduction to LSAT prep but I didn't start to feel like I was really getting it so it felt natural until I picked up other resources alongside PTs and CC.

If you feel like you're not confident in any of the sections (I'm assuming your strongest sections are logical reasoning given your philosophy degree, feel free to correct me), wait for a couple of months.

If you're panicked at the idea of taking the LSAT in 5-6 weeks, wait.

If you think that taking the test digitally is a better fit for how you like to test, wait.

If you just graduated and are feeling college burnout, then please wait and give your brain a chance to heal. Like wait a year, if need be.

I graduated undergrad in 2014, went to grad school, and have been working now for three years so don't feel obligated to rush to law school if you need a break or want more life experience under your belt before focusing on the law school process. Yale/Harvard/Penn/Stanford are not going anywhere.

If you are sure about waiting to apply to schools until 2019-2020, wait because you've got plenty of time to study at a leisurely pace. At the very least, you can use the time to work on your PS, get recommendation letters lined up, or improve your softs for when you do apply.

However, if you feel like you're just not quite where you want to be with your scores and feel like you can get there in 5-6 weeks - which is a personal assessment only you can make - and are willing to focus on nothing but studying through the holidays coming up (who needs family/friends when you've got PTs to keep you company, am I right?), then you might want to consider taking the LSAT in January.

If you get to the testing center and find yourself thinking, "Oh my great goodness, I'm so not ready for this...I feel like today's the day I die," then cancel the score and take the whole thing as an expensive learning experience for next time.

It could be age.

I'd imagine a lot of younger LSAT takers probably have a more intuitive ability to focus when reading text digitally vs print. That's a generalization, of course, but it could be applicable to your case. For example, I'm on the tail end of the youth wave (mid-twenties) and I prefer print text with any sort of heavy duty reading, even with logic games. When I was in grad school, I would take notes with pen and paper. Reading online just makes my eyes wonder to my notifications, so not good.

Either way, sounds like you might want to consider waiting for the digital test dates if the problem is getting in the way of achieving the scores you want. Or you could buy/borrow/steal print PT books from LSAC/friends/family.