1. I don't think this is the Statistics function back, but the 30 day report that was previously offered and was different to the detailed Statistics section. I always declined the 30 day statistics report option as I feel it is more a selling opportunity than detailed statistical information; if you see all of those bits of click bait, 'Activate', 'Resolve Issues', 'All Secured' thanks to Avast SecureLine and 'Scan for hidden junk.
2. That little 1/4 panel at the bottom of the UI has essentially been an ad/promo window. More so in the free version, why it is in the paid version I don't know, especially if the paid user has switched off ads.
Finally I haven't seen it in avast free 17.5.2303 regular release version on this win10 system, just one of the usual ads/promos in avast free.