Here is my take on the recon class and what i would like to see and I agree with some of what was pointed above.
First the glint that always shows up when you aim should be removed unless you are under direct sunlight. These will make players weight the pros and cons of where or how you approach the battle. If you prefer terrain advantage at the cost of being spotted by everyone go for it , you can stick to the shadows and pick off stragglers (you can change position and keep the enemy guessing and afraid), or stick to your squad and spot enemies (counter sniping, avoid ambushe, flank or flush enemies into kill zones).
Second scopes magnifying strength should have an impact on how strong the scope glint is. bring back the exaggerated bullet drop (really enjoyed the challenge), point and shot its fine but its not as satisfying. I have mix feelings about having infinite c4 (i like it but having a limited amount would incentivice more team play as you'll need support to keep you restocked.
Third the fatal head shot i love it. It rewards the player for being a sniper otherwise enemy squads would simply rush you and keep reviving each other. This works more as a deterrent for players that just want to run and gun all the time and it would reward those that are more cautious about just rushing alone or not use smoke. Like how chest shot give away the enemies location by slightly flashing red so I would like to keep that if the chest shot isn't a kill but I would like to see 1 shot kills from a sniper specially if you change the ammo type
Fourth i don't see the TTK as much of an issue since recon shouldn't be looking for head to head fight (specially on close quarters), recon should be trying to flank, back stab, set some traps with c4, get creative and don't forget you have a motion sensor, use it to make sure you are not being fallowed or help you blow up an enemy "you don't even need to poke your head out to know where he is at". you can also chose a different weapon but I'll admit assault is too tanky so run away (don't forget smoke grenades)
Fitht The auto spotting and marking the ground conflict with each other as auto spotting makes it obsolete. I would prefer auto spotting to only be shared with allies that are near you, so with out a recon unit near you, you'll have to rely on your own ability to spot enemies (good luck with that) or roughly have an estimate of where the enemy is when someone marks the ground.
Lastly since you can spawn motion sensors indefinitely, the drone ability might need a rework not sure in which direction yet, as i would like to see whats changes are made for the coming play test and what gadget will replace the spawn beacon