TC277, Ethernet and additional high-speed interface

We would like to use the TC277 in our next product.

We need to use the Ethernet Interface and a high-speed interface (to an FPGA).

Q1: Is it right that EthernetMAC and QSPI (or HSSL) cannot be used together due to pin assignment ? Example:

Pin B9 is used as ETHRXD0, SLSO03 => QSPI0 or QSPI1 cannot be used when Ethernet is used.
Pin K19 is used as ETHMDC, MRST2CN, MRST3FN, HSCT-RXDN => QSPI2, QSPI3 or HSSL cannot be used when Ethernet is used.
Pin J19 is used for ETHMDIOD and HSCT-RXDP => HSSL cannot be used when Ethernet is used.

(I’m wondering, why a timing critical signal like the ETHRXERB is connected to a JTAG signal.)

The next “high-speed” interface is the ASCLIN, right ?

Thank you for your answer in advance.