kiklo,
The O(n^2) sigop attack cannot be mitigated with Electrum X or by simply buying a faster Xeon server.
As Gavin said, we need to move to Schnorr sigs to get (sub)linear sig validation time scaling.
And AFAIK moving to Schnorr sigs at minimum requires implementing Core's segwit soft fork.
Informed Bitcoiners like Adam Back and the rest of Core plan to do segwit first, because it pays off technical debt and thus strengthens the foundation necessary to support increased block sizes later.
So you are saying their Developer is not competent enough to find a solution.
I think if the Developer of electrum was actually worried about it , he would have mentioned it when asked point blank on the blocksize issue.
(His biggest issue is he just wants the debate over so he knows which direction the network is going.)
Segwit is not going to happen , the miners are not giving up their livings just so Core can take over BTC with an iron fist.
So unless Core is forcing a fork, they better start looking for other solutions , like BU.
And if they do force a fork , my money is on the Chinese miners crushing them.
FYI:
Electrum is 5% to 10% of the BTC users, it is an all volunteer group, they receive no funding.
So neither BTC core or the Miners are really worried about them or their users.
FYI2:
https://www.buybitcoinworldwide.com/wallets/#hot-wallets