Had a SEA-LHR-CDG booking impacted. Trying to figure out best re-route option. They rebooked me on SEA-ORD-LHR-CDG, which isn't great.

Could do SEA-LHR-CDG on BA, with the new suites, but afraid to get an aircraft swap to the crappy old seats, which they've done to me everytime I've tried to fly them.
SEA-ORD-CDG, SEA-DFW-CDG and SEA-PHL-CDG are options, but don't want to get the dreaded concept D seats, not sure how to tell how likely they'd show up.
Supposed there is also SEA-HEL-CDG, never flown AY, so not sure how it'd compare.