Downloading stock firmware is tricky since Samsung doesn't provide downloads on their own website, and using alternative roms like Lineage and derivatives it like having a tablet like thousands of others, with no real differentiation besides the size of the tablet and the Samsung logo, I'm very surprised how good the stock rom is, but we are taking about Samsung a company that has money to pay for a good developing team.
Just wanting for whistlers and bells from luattic, because as good the stock rom is with no tweaks or modifications, I also like very much the freedom on my gadget to make whatever I want, and Luattic´s work does just that.
Btw , for those who still don't have this tablet, now is a good time to buy it, because of the eminent release of the successor Tab A2 10.5, Samsung is just disposing the remaining stock of the previous generation at cheaper prices.