I dont know if these were mentioned but here goes.
Elevators:
I dont know if im the only one or not but i quite frankly am getting tired of using platforms all the time to navigate around my base. I believe elevators would be an exciting addition and sophisticated look to the game and id love to see some.
-Elevator pod(Elevator lining or blocks or. Etc.)
Used to place an elevator within desired spot ready for lining and wiring
-Elevator lining
Sets the beginning and distance the elevator travels up and down and is required to construct a fully functional elevator.
-Elevator switch
A switch specifically for the elevator to designate the many floors there are and which stop the user wishes to land
-Elevator stop placement (Elevator floor set and indicator)
Basically sets the floors of the elevator and can be wired into the switch that when triggered will stop at the specific desired floor.
(These elevators will consist of high speed travel for convienence)
NOTE: To all the people who have very high altitude built bases we feel your struggle!
More traps:
-Freezer:
Once stepped on by unit, the unit will then be incased within an ice block around the sprite and stopped (or severely slowed) for a second (if trapped in ice) and repeated with a cooldown time of two seconds before trapped again.
amage output 50 per.
-Laser trap (names Laze-r Trap for lols)
Can be set to periodic activation per numeric seconds or always active. (Can be mined with picaxe on both sides of laze-r)
With different color uses.
Red for player
Blue for monster.
amage out put 25 per sec (rapid fire within laze-r)
-Weapon trap
Yes. A trap where you can make use of your uneeded or extra weapons where you can put either a Sword (swaying back and forth or act as spears) or bow (act as darts) gun (same as bow) yoyo (follows enemy within weapon range) grapple ( same as yoyo) magic (will work like flamethrower)
For range weapons there will be a inventory stock individually for this trap that can be restocked whenever with desired ammo (max 999) whereas there will be a count as to how many the trap has left either visibly or when hovered over by cursor. For magic there will be limited amount of mana (100 limited) whereas will act like regular mana a user would have except xan visibily be seen as mini blue bar under the trap to indicate mana gauge.
Now i know many of you are thinking oh this can be over powered and broken; however, No. For each weapon there will be a divider which nullifies a certain amount of damage from the original damage output depending on the amount of damage the weapon has.
-Timer set-r
A rare tool that can either be bought for one platinum, or crafted. Once held, user can set a timer on that specific ( or range of) wired activations and mechanisms. A window pops up where the seconds of the timers can be chosen (1-60 gametime seconds). What this tool will provide is no need for physical timers for convienence. To change second output just reclick and reset.
-Motion sensor
The motion senser will act as pressure plates in a sense (ba dun tss) whereas it is activated when set unit type reaches the range of its vicinity (can be set to either monster, NPC, Boss, or player) but the difference is that this will work as a set range of blocks desired from the creator (max 20) once it is placed at desired location and right clicked, a window will pop up with the option to "Set Motion Detect Range" where a grid will then appear around all blocks within view and player can manually select the desired blocks (there does not need to be actual blocks) where each desired range (20 max and range limited to 20) can be highlighted and set as player wishes. Another option is to set the activatee unit (checklist for types of units that will trigger the wired setup the motion sense is connected to). With each unit option there can be a set up of different responses which will not interfere with one another. For example there is a sort of dungeon-like entrance towards ones base and traps all around. Once the player walks in the range of motion sense detector the door to the base is now opened and can be accessed by said player.
Once a monster (whether air unit or ground) comes into contact within motion senser, the set traps are then activated to prevent any monster invasions upon base. If this motion sense however is within a dungeon to activate traps to eviscerate the player, with precision and speed the motion sense can be broken and used with a picaxe of 150+ power
NOTE: I believe this will set numerous possibilies of endless imagination theoughout terraria aswell as the possibilities of new dungeons and boss setups.