Is the today section hidden? or constantly there? And... any memory leak? I've only found one theme that doesn't slow my OS to a crawl.
The Today section is always displayed, you have to have the home screen icon option set to two rows.
As the thread says these are simple themes with very little modifications done to the stock theme in Plazmic. I have been running the Today one for a couple of weeks in 4.7.0.103 OS with no problems. Like you I've had a lot of problems with other themes which is why I made these.