from the ESXi's >> there are no traceroutes 

[root@esxi-1:~] traceroute 10.50.0.1
traceroute to 10.50.0.1 (10.50.0.1), 64 hops max
1 * * *
2 * * traceroute: sendto: No route to host
[root@esxi-1:~] traceroute 10.60.0.1
traceroute to 10.60.0.1 (10.60.0.1), 64 hops max
1 * * *
2 * * traceroute: sendto: No route to host

from the Pfsene it works fine

[2.4.5-RELEASE][admin@pfSense.localdomain]/root: traceroute 10.50.0.1
traceroute to 10.50.0.1 (10.50.0.1), 64 hops max, 40 byte packets
1 172.27.11.2 (172.27.11.2) 0.806 ms 0.605 ms 0.601 ms
2 10.50.0.1 (10.50.0.1) 2.137 ms 0.524 ms 0.720 ms