Basic Economy is horrible. Period. Especially for transatlantic flights. Absolutely ridiculous to charge $1,000+ for a ticket where you can't choose seats or check in luggage or get any miles/elite credits, etc, without paying another $150.
The crazy part is that the justification for moving to basic economy for transatlantic flights is not around anymore (those airlines are gone), and the justification makes sense when flights are $350, never when they are more than $500.