The only problem is that the new European destinations of TP (WAW, HEL e DME) have schedules which were adjusted the former Brazil schedules (and partially LAD). This means they now are totally unfit for any connection to Brazil. It's the case of HEL (departure from LIS at 22h20 and arrival at 08h35) and WAW (departure from LIS at 16h50 and arrival at 09h05). I'd therefe expect some further schedule changes in these destinations.
I am not sure about DME and HEL, but WAW could be done as a same day turnaround, it is a 4 hour flight, so I imagine a schedule like
LIS-WAW 10.00-14.00
WAW-LIS 15.00-19.00
would still offer a nice connections to RIO,SAO and a few more destinations.