All valid points, however I think closing a runway (ie.Rwy35) when literally thousands of aircraft have departed safely from that runway is not much of a solution.
The PIC should have reviewed the weight/balance data and made a go/no go decision. This however is something that has been ignored at peril in the past (Chieftain a few years back, C172 etc), and can be difficult when faced with keeping your job.
This is where the SACAA should be more involved, ensuring pilots are protected from employers when making these critical decisions.
An over weight a/c flying out of ground effect is comparable to an "in limits" single experiencing partial, or complete, engine failure.
Weight is relatively unimportant at this stage (unlike twins), yes...a higher stall speed, higher ROD etc, but you still have only ONE option:
If it won't fly (negative ROC and/or approaching the stall) a forced landing, as close to straight ahead as possible, is the ONLY option.
Irrespective of terrain, building site etc...
Do not attempt to turn back, a stall/spin WILL kill you!