For me personally, epic TS is good enough in many cases and easy and reliable to get. I am only using TS on HRise and EH anyways, so i considered having a precious takeover slot for just 2 maps is overkill.
Fair enough. I only use on hardened levels recently but that's been through choice to see how long they take. The extra troops for legend is helpful sometimes
Because Ivan can put 1 TW (on cooldown) on 4th slot and when SAsc, the TW is unslotted but cooling down, so a new one can be used (only useful for <16h SAsc)