Done with DuoLingo Arabic.
I think it's time to move to Russian on DuoLingo and switch to Rosetta Stone for the rest of Arabic training.
I want to thank TJ_Q8, Elke et al for all the helpful posts here.
I will keep checking the DuoLingo Arabic for updates and do what it takes to keep the tree gilded. Probably will spend most of my DuoArabic time going through the notes and making corrections.
And thanks to husainbadr1 for reminding me, Русский язык – самый лучший и самый богатый язык в мире...