Hopefully a lot of us are familiar with the rules that apply to redstone, no clocks are allowed. Massive already has very good counter measures to prevent people from leaving their clocks on, not allowing them to leave the chunk in order for it to continue, and im also guessing the staff can easily detect who is causing a dip in the TPS.
Now I understand its for the safety of this server and the concern of crashes is valid. However is it possible that punishments can be directed towards machinery that impact TPS. I for one enjoy redstone, its a part of this game which makes minecraft what it is today. So my suggestion is to allow redstone clocks once again, however people need to get their machine approved (if it has a clock) by the staff via ticket system, if they break any rules they should be warned first, any machinery that is built towards intentional harm towards the server's TPS should be result in an immediate perma ban.
If this suggestion is rejected I completely accept it and will no longer pursue building redstone clocks. Than you for listening to me, I am already glad on the direction Massivecraft is heading and I want to say you are doing a fantastic fucking job, loving every bit of commitment here and I'm super excited about the next incoming update.