Superloop has come back with an enhanced offer, which it terms as its "best, improved and final offer".
It's a bit complicated, but the gist is that the implied value of SYM shares is slightly higher than the initial proposal ($2.91 v/s $2.85 under the default 50:50 cash/scrip mix), and that Symbio shareholders have more flexibility in choosing the mix of cash and scrip they want to accept. A 15cps special dividend is also on the table should the SYM Board choose to declare it.
I'm not sure it's that much of an improvement at all overall.