I think some simple signal that the blob is growing is going to help, like the outlines of the blob starts to flash a few seconds before they grow of the old school effect of the blob shifting between the old size and the new size a few seconds. That way they won´t just suddenly be bigger and I belive that is what makes it look “awkward”. Could be worth a try cause it sounds a lot simpler than rewriting the blob growing code. 
Tried to give this game another try on my new PC but still got the same shader error.
My hardware is:
- Intel Core i7 4770K @ 3.5Ghz (8 CPUs)
- Nvidia GeForce GTX 780 (3GB VRAM DDR5)
- ASUS Z87 MB
- 16GB RAM (Corsair Vengeance) @ 1600Mhz DDR3
- Razer Mamba 4G
Software:
- Windows 8.1 Professional
- Java JRE 7 (Oracle)
- Latest Nvidia Beta drivers
how do you currently make the blob grow?
http://s13.postimg.org/5h7rc5o9j/error.png
I got this error. You said you fixed it, but then I got this error… haha. I know it is tough. Ill wait patiently.
Or I could piss and moan like an american… well I am an american. Ya, what am I thinking? GIVE ME BLOB NOW!!! 
Note: I am running OpenGL 3.0
At the first screenshot there are really nice soft shadows but on other material I can’t see those?