I am not familiar with how 100 EZ lessons teaches reading, so I may not be of much help.
I did just find phonics pathways though. I got a copy off ebay for I think $6 including shipping. It was definitely worth the money. I used Abeka with my first two children and this book is pretty much Abeka phonics K-2nd grade in one book.
It starts off teaching blending two letter sounds-ba, be, bi, bo, bu etc. And then moves on to three letter short vowel words.
My 6 year old that I am using it with has language delays among other issues and we skipped the blends and went to reading short vowel words. She just was not getting the blends.
It might be worth trying. It also wouldn't hurt to take a break for a while. Sometimes I find that my kids minds need to mature more. If they aren't getting something and I put it away for a couple months and pull it back out, they all of a sudden are able to do it. I probably wait too long though, lol. My kids all started reading a couple months into their 1st grade year. They were reading chapter books soon after though. I never taught sight words etc.