What do you mean with a "51% attack"

Don't know who told you that, but there is such a thing as a 51% attack on EOS, either through controlling 15/21 block producers or controlling 51% of the stake, either of these methods allows one to choose the block producers and reorganize the blockchain.

Sisterchains are still built on EOS.io, but then often more centralized implementations of the software. That's a feature, not a bug.

They are built on eosio but they don't provide anything at all to EOS the token, people say that sisterchains are good for the ecosystem but that's like saying BSV and BCH are good for BTC, or ETC is good for ETH, they aren't! They just steal possible use-cases and dilute all the new money between many chains, a divided ecosystem is a weak ecosystem. The Euro zone exists because European countries joined each other so they could go against bigger economies like the dollar... and IBC won't unite everything, just beause ETH can be united with ETC it won't make ETH and ETC the same coin or the same ecosystem at all...

Concerning governance... What about the @freedom account on Steem? Not even B1 has that amount of power on EOS

I wasn't comparing EOS and Steem since I do know Steem also has it's issues, still, freedom votes for block producers that are part of the community, that people know, the guy doesn't upvote witnesses that no one knows so they can steal away block production and sell it on the market, or even worse, he doesn't collude with witnesses to give him revenue for upvoting them.

I've been telling people for months that these issues would sooner or later be exploited and there should be fixes ASAP for them, everyone told me I was a FUDster and that "I didn't get it"... now the issues are obvious and a large portion of dapps are moving away from EOS. Lol

Thanks for reading!! Always glad to answer some of these questions, there seems to be too much shilling inside the EOS community and not enough actual information or economic knowledge.