Even with sequential fuel injection, intake valve opening events happen so
fast that by 2-3k rpm the injector is spraying part of the fuel on closed
intake valves anyway.  The fuel just doesn't have that much time to pool.

Sequential is good for emissions and improves economy slightly.  If you
spend much time in traffic or light cruise, this may be a good upgrade.

For max power, a batch fire system is just as good as sequential.