If they continue to print eternal masters sets in the off years of modern masters, wizards is doubling their opportunities to reprint relevant modern cards.
Without batterskull, there is not enough protection to keep your life total high enough to not die on the swingback from playing jace, or to keep him alive after his first activation. Same with SFM, she tutors an equipment, then puts it down, you can't spend the mana to equip it in a control deck because you need to leave open mana for stack interaction, and the only creature you have is SFM anyway. A sword will not break the game, pretty much everyone has artifact hate.
I don't understand why people think control has to play either of these cards as soon as they have mana for them. Against aggro, you can stabilize with Wall of Omens/Lone Missionary/Kitchen Finks and removal spells and throw down a Supreme Verdict to stabilize the board before landing Jace on later turns to permanently turn off your opponent's topdeck mode. You don't just throw the guy down T4 and leave the shields totally down.
fateseal 1 does not turn off your off your opponent's topdeck as every time you put a card on bottom they get a random card. Even if they were 50% land it would not be uncommon to have 2 nonland cards in a row. Fetchlands help too. I also don't see anything unfair about playing jace as you describe on turn 5 or later, drawing no card and going strait to fateseal lock.
good card selection spells like ponder and preordain only overpower combo decks when you can play all of them. As long as modern is limited to a single 1 mana ponder effect, ponder or preordain would be great for modern. this type of effect is needed for decks built around reactive answers.
I personally do not like banning cards to shake up the format but other people do. A possible compromise could be to use a time limit when banning a card for reasons other than power. If a card like twin is banned for a period of 2-3 years you get to shake up modern twice. We know twin would be a safe unban because twin was not banned for being too powerful, just too popular.
The best thing wizards could do for control would be to switch ponder for serum visions and sleight of hand on the banned list. Ponder is 3x as likely to find the answer you need this turn vs serum visions. Counterspell would be awesome but i dont think its necessary. We need to be able cast a filter spell and get the card we need this turn rather than next turn.
I feel that the problem with cards like ponder is not their raw power level but the redundancy you can get by running ponder, preordain, serum visions, and sleight of hand together. Modern should be limiter in the amount of 1 mana filtering spells it has access to but it should have the strongest 1 rather than the weakest 2. Unbanning ponder while banning serum visions and sleight of hand would greatly improve control and delver.
fateseal 1 does not turn off your off your opponent's topdeck as every time you put a card on bottom they get a random card. Even if they were 50% land it would not be uncommon to have 2 nonland cards in a row. Fetchlands help too. I also don't see anything unfair about playing jace as you describe on turn 5 or later, drawing no card and going strait to fateseal lock.