¿What are your own ideas for the marksman updates?

I have been playing since season 3, played almost main adc since the start. I have seen the raise of BT and his opression in lane, i saw the nerfs on BotrK, the last marksman update...etc and how it affected the meta Now i see a lot of marksman that trend to have a more special build. In last years, the typical build was Bt+ crits, Ie+crits, or botrk + crits, that gave marksmans a lot of late bursty playstyle or more like "i crit more, we win the game" style. Now i see a lot of carrys that usually go botrk+runaan, or double lifesteal, or basically no IE (i know cait trist are in the meta) but a lot of marksmens now trend to a less bursty build to a more dps reliable build, without many crits (more like "i know how many damage i am going to do") What are your thoughts on the preseason marksmens changes, you think there will be new builds and metagame, they will improve the "safe DPS" meta that is raising or they will buff the carrys that rely on early crits? I want to know your opinion or ideas for the season changes ^^ At least, for me, i want to see more love for the yoummu (¿maybe a little update that benefits the fantasy of "super 6 seconds of kiting" of the yoummu?) and at least a defensive/ofensive item like the zhonyas (hey, mercurial is great but it cant help anyone from the juggernauts ;_; ) Also, i want to know your opinion about the Cleanse and barrier I would like to see a high risk high reward summoners for example, barrier: blocks a spell and a bit of dmg, or blocks all damage but only in 0,25 secs, blocks damage that excels a % of your hp in less than X seconds, more likely a high cd anti assassin spell, or i dont know For cleanse, a good buff would be a "cleanses and blocks cc in next 0,1 seconds". I mean, that wont make op kata or mf it would be 0,1 seconds for example, it just wont punish you for failing cleanse (i lost a lot of tf due to a cleanse on yellow card, ashe arrow, 0,1 secs before it hits) and it wont make the Heal>cleanse and take a mercurial instead of taking cleanse and get extremely punished on lane. Just make cleanse a viable spell for adc that want some cc protection instead of only mercurial (at least i only see cleanse on mid laners,cause, you know,isnt very good taking mercurial when you are an ap champion).

So,marksman update, ¿ideas on items, champs and summoners to make more diverse the game without buffing other lanes? Sorry for the english, isnt my mother language